Tohoku University. Research Profiles

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"M" Keywords - 159 Result(s)

M

 M

[M2M]

Message Transmission without Cellular Coverage, “Relay-by-Smartphone"

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Features

Our technology provides the necessary method for sending messages even when the physical infrastructure is not available. The technology utilizes common smartphone WiFi functionality to send message in a multi-hop fashion. Thus it is possible to send message to people further away. Our technology has been designed to be based on Delay-Tolerant Networks (DTN), but the technical key idea is the combination of DTN and Mobile Adhoc Network (MANET), which can improve the message delivery in an area with high population density or where mobility are fixed such as evacuation center.


Targeted Application(s)/Industry

This technology can be used to distribute information during emergency situation such as after disaster. In addition, it is possible to provide additional services such as advertisement within shopping areas, distribution of coupons, exchange of information within small group during public events or uses as transceiver during group hiking. There is also possibility of using this technology to provide communications service in developing nations.

Graduate School of Information Sciences
KATO, Nei, Professor Doctor of Engineering

[Macroclusters]

Development of Nano-Interface Chemistry for Materials Sciences Using Surface Forces Measurement

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Features
Our research aims at developing methods, including instrumentation, for characterizing surface (or interface) at the nano-meter level. Most of our research subjects are related to the surface forces measurement, which can directly monitor the interaction between two surfaces. We study phenomena occurring at the solid-liquid interface such as adsorption and structuring of liquids. We have developed the resonance shear measurement which is a sensitive method for evaluating properties of confined liquid for nano-rheology and tribology. Twin-path surface forces apparatus we developed enabled us to study wide variety of samples such as metals, ceramics and plastics.

Targeted Application(s)/Industry
These methods are applicable for characterizing lubricants, nano-materials, paints, sealants, and cosmetics. We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.

Institute of Multidisciplinary Research for Advanced Materials
KURIHARA, Kazue, Professor Doctor of Engineering

[Magnetic film]

Polymer-nanoparticle hybrid materials

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Features
Hybrid materials that show multi-functions of polymer and nanoparticles are expected to be used in future industries, and thus many research and development have been actively conducted. However, since the affinity of polymer and inorganic nanoparticles is very low, in most of the cases, properties of different materials are incompatible in the hybrid materials. To create the hybrid materials with incompatible multi-functions has been considered a difficult task.
However, by using supercritical fluid technology, we have succeeded in making hybrid materials with incompatible multi-functions.

Targeted Application(s) / Industry
Now, variety of hybrid materials are being developed, including
・Transparent, flexible, high reflective index, and high fabricability,
・Flexible, high heat conductivity, low electric resistivity, and high fabricability.

Advanced Institute for Materials Research
ADSCHIRI, Tadafumi, Professor Doctor of Engineering

[Magnetic Material]

Magnetic Applications and Magnetic Materials

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Features

The aim of our research are to obtain the high accuracy sensor system for the signals from the human body or electric devices and to obtain the system for approaching action to the human body by using the nano-scale controlled magnetic materials and by the development of the devices under the functions of the magnetics.
We studied the mechanism of obtaining the magnetic anisotropy of the magnetic thin films for the sensitive magnetic sensors. We obtained a non-metal probe for high frequency magnetic field, and confirmed the probe can measure the high frequency magnetic field with its phase information. In addition, 3D position detecting system using magnetic markers was studied to improve its position accuracy. The study about the magnetic actuator driven by the external magnetic field was carried out for biomimetic robots using the rotational magnetic field, and small wireless pumps were obtained and clarified for their application for an artificial heart-support pump.


Targeted Application(s)/Industry

<Medical Applications>
Motion system for capsule endoscope, Support system for endoscopic surgery, Position detecting system (motion capture), Wireless pump for artificial heart
<Sensors>
Magnetic field sensors, Strain sensors, Wireless sensors
<Materials>
Electrical steels of ultra low loss, Electrochemicaly produced materials (structure controlled in nano-scale)

Research Institute of Electrical Communication
ISHIYAMA, Kazushi, Professor Doctor of Engineering

Development of Soft Magnetic Materials and Magnet Consisting of Complete Rare-Earth Free Elements Both with Ultimately-High-Efficient Types Contributing to Energy- and Resource-Saving by Precise Controlling their Nanostructures

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Features and Originalities
Research activities include high functionalization and attachment of additional values to the soft magnetic materials of iron-group based metallic glasses, nanocrystalline and amorphous alloys and magnets, both from non-equilibrium alloys with useful properties that have not been achieved by conventional crystalline alloys. Recent successful results contain newly-developed nanocrystalline soft magnetic alloys with high saturation magnetic flux density of 1.8 Tesla or higher and low core loss of ~1/3 to that of the Silicon steels and fabrication of rare-earth free L10-FeNi magnets.

Possible Academic/Industrial Collaborations
The target materials possess high potential as industrial materials owing to Fe-based alloy with low material costs accompanied by rare-earth-free nature and to producibility in an air environment. Expectations are contributions to energy-saving, saving mineral resources and reducing carbon dioxide emissions through collaborations with companies dealing with materials and applications.

New Industry Creation Hatchery Center
MAKINO, Akihiro, Professor Doctor of Engineering

[Magnetic refrigeration]

Development of a High-Efficiency Hydrogen Transportation and Storage System Using Slush Hydrogen and Liquid Hydrogen

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Features
Solid-liquid two-phase slush hydrogen has a number of desirable characteristics as a functionally thermal fluid, taking advantage of the high density and latent heat of fusion due to the solid particles. The principal researcher has been proposing a high-efficiency hydrogen energy system (Fig. 1). The principal researcher has also undertaken research and development works such as density and mass flow-rate meters for slush hydrogen (Fig. 2), heat transfer characteristics of slush hydrogen as the refrigerant for superconducting machines, and a numerical analysis for thermo-fluid characteristics of slush fluid flow (Fig. 3).

Targeted Application(s)/Industry
We hope to conduct collaborative research with a willing company for a practical application of these technologies in hydrogen energy industry.

Institute of Fluid Science
OHIRA, Katsuhide, Professor Doctor of Engineering

[Magnetization of nano-magnet]

Electrical Detection of Magnetization Process in Nano-Scale Ferromagnet

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Features
A nano-scale ferromagnet has onion and vortex states in its magnetization. Especially the vortex state is important since the stray field from the ferromagnet is suppressed. It is expected to apply it to high density non-volatile memory because of two different magnetized orientations, clock-wise and counter clock-wise directions. We have experimentally and theoretically confirmed that the chirality of the vortex state can be detected with an electrical way (Fig. 1). Furthermore, by putting a single nano-scale ferromagnet on top of a semiconductor Hall bar, we have demonstrated that the magnetization reversal process can be electrically detected with a very high sensitivity even without using SQUID (Fig. 2).

Targeted Application(s)/Industry
As an example of applications, the method is applicable to magnetic sensor with high sensitivity and high density non-volatile memory. We are prepared to provide academic consultations to companies interested in our research.

Department of Materials Science, Graduate School of Engineering
NITTA, Junsaku, Professor Doctor of Engineering

[Magnetization reversal]

Electrical Detection of Magnetization Process in Nano-Scale Ferromagnet

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Features
A nano-scale ferromagnet has onion and vortex states in its magnetization. Especially the vortex state is important since the stray field from the ferromagnet is suppressed. It is expected to apply it to high density non-volatile memory because of two different magnetized orientations, clock-wise and counter clock-wise directions. We have experimentally and theoretically confirmed that the chirality of the vortex state can be detected with an electrical way (Fig. 1). Furthermore, by putting a single nano-scale ferromagnet on top of a semiconductor Hall bar, we have demonstrated that the magnetization reversal process can be electrically detected with a very high sensitivity even without using SQUID (Fig. 2).

Targeted Application(s)/Industry
As an example of applications, the method is applicable to magnetic sensor with high sensitivity and high density non-volatile memory. We are prepared to provide academic consultations to companies interested in our research.

Department of Materials Science, Graduate School of Engineering
NITTA, Junsaku, Professor Doctor of Engineering

 m

[magnetic actuator]

Magnetic Applications and Magnetic Materials

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Features

The aim of our research are to obtain the high accuracy sensor system for the signals from the human body or electric devices and to obtain the system for approaching action to the human body by using the nano-scale controlled magnetic materials and by the development of the devices under the functions of the magnetics.
We studied the mechanism of obtaining the magnetic anisotropy of the magnetic thin films for the sensitive magnetic sensors. We obtained a non-metal probe for high frequency magnetic field, and confirmed the probe can measure the high frequency magnetic field with its phase information. In addition, 3D position detecting system using magnetic markers was studied to improve its position accuracy. The study about the magnetic actuator driven by the external magnetic field was carried out for biomimetic robots using the rotational magnetic field, and small wireless pumps were obtained and clarified for their application for an artificial heart-support pump.


Targeted Application(s)/Industry

<Medical Applications>
Motion system for capsule endoscope, Support system for endoscopic surgery, Position detecting system (motion capture), Wireless pump for artificial heart
<Sensors>
Magnetic field sensors, Strain sensors, Wireless sensors
<Materials>
Electrical steels of ultra low loss, Electrochemicaly produced materials (structure controlled in nano-scale)

Research Institute of Electrical Communication
ISHIYAMA, Kazushi, Professor Doctor of Engineering

[magnetic anisotropy]

Magnetic Applications and Magnetic Materials

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Features

The aim of our research are to obtain the high accuracy sensor system for the signals from the human body or electric devices and to obtain the system for approaching action to the human body by using the nano-scale controlled magnetic materials and by the development of the devices under the functions of the magnetics.
We studied the mechanism of obtaining the magnetic anisotropy of the magnetic thin films for the sensitive magnetic sensors. We obtained a non-metal probe for high frequency magnetic field, and confirmed the probe can measure the high frequency magnetic field with its phase information. In addition, 3D position detecting system using magnetic markers was studied to improve its position accuracy. The study about the magnetic actuator driven by the external magnetic field was carried out for biomimetic robots using the rotational magnetic field, and small wireless pumps were obtained and clarified for their application for an artificial heart-support pump.


Targeted Application(s)/Industry

<Medical Applications>
Motion system for capsule endoscope, Support system for endoscopic surgery, Position detecting system (motion capture), Wireless pump for artificial heart
<Sensors>
Magnetic field sensors, Strain sensors, Wireless sensors
<Materials>
Electrical steels of ultra low loss, Electrochemicaly produced materials (structure controlled in nano-scale)

Research Institute of Electrical Communication
ISHIYAMA, Kazushi, Professor Doctor of Engineering

[magnetic circuit]

Development of the Nickel-Free Dental Magnetic Attachment Using the Magnetic Shielding Material which Lost its Magnetism by Nitrogen-Solid Solution

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Features
In the dental magnetic attachments which retain dentures, superstructures of dental implants, and so on, the non-magnetic stainless steel containing nickel is used in order to reinforce their retentive force by a magnetic circuit. The surface layer of magnetic stainless steel which loses its magnetism by nitrogen-solid solution obtained from heating in nitrogen gas at high temperature, enable to form a magnetic circuit, which does not contain nickel at all, and to reduce its components and manufacturing processes. The method using the nitrogen-solid solution in this study is warrantable to manufacture the nickel-free dental magnetic attachment with high safety.

Targeted Application(s)/Industry
The nickel-free magnetic attachment realizes a retainer with higher safety, and can expect the application to medical and dental care for clinical uses, such as not only a denture but a dental implant, an epithese, and so on with easy desorption.

Division of Dental Biomaterials, Graduate School of Dentistry
TAKADA, Yukyo, Associate Professor Doctor of Engineering

[magnetic materials]

Spintronics Devices and Materials

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Features
Spintronics is a technology utilizing electron spin which provided magnetic sensor, nonvolatile magnetic memory, and so on. Our studies are as below.

Noble & Rare-earth free magnetic films with large perpendicular magnetic anisotropy. We achieved to develop various Mn-bases alloy films exhibiting high perpendicular magnetic anisotropy (Fig.1 ).
THz range observation of magnetization motion. We achieved to detect a motion of magnetization using pulse laser in time domain (Fig. 2).
Novel organic spin devices. We achieved to fabricate hybrid junction consisting of an organic layer sandwiched by two inorganic magnetic layers and to observe magnetoresistance effect.
Tunnel Magnetoresistive devices: We are developing TMR devices with Mn-Ga alloys films (Fig.3 ).

Targeted Application(s)/Industry
Magnetic memory and storage. Microwave and Terahertz wave. Magnetic sensors.
We hope to conduct collaborative research with a willing company for a practical application of these devices and materials in industry.

WPI Advanced Institute for Materials Research
MIZUKAMI, Shigemi, Professor Doctor of Engineering

[magnetic memory]

Physical properties and spin dynamics of nanomagnets and their application to magnetic memory devices

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Rapid progress toward information society has aroused much attention to magnetic memory devices because of their nonvolatility, high data density, low cost, high-speed accessibility. With reducing their constituent size down to 10 nm, various effects, such as surface and quantum size effects and thermal agitation of spins, appear and hamper further advance in device performance. It is indispensable to elucidate various physical properties of nanosized magnets. Under this circumstance, our intensive effort is focused on (1) size effect on crystal phase of magnets, (2) highly sensitive magnetic detection technique, (3) magnetic behavior of single nanomagnets, (4) new SPM lithography, and (5) new media and technology for ultrahigh density recording.

Institute of Multidisciplinary Research for Advanced Materials
KITAKAMI, Osamu, Professor Doctor of Engineering

[magnetic sensor]

Magnetic Applications and Magnetic Materials

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Features

The aim of our research are to obtain the high accuracy sensor system for the signals from the human body or electric devices and to obtain the system for approaching action to the human body by using the nano-scale controlled magnetic materials and by the development of the devices under the functions of the magnetics.
We studied the mechanism of obtaining the magnetic anisotropy of the magnetic thin films for the sensitive magnetic sensors. We obtained a non-metal probe for high frequency magnetic field, and confirmed the probe can measure the high frequency magnetic field with its phase information. In addition, 3D position detecting system using magnetic markers was studied to improve its position accuracy. The study about the magnetic actuator driven by the external magnetic field was carried out for biomimetic robots using the rotational magnetic field, and small wireless pumps were obtained and clarified for their application for an artificial heart-support pump.


Targeted Application(s)/Industry

<Medical Applications>
Motion system for capsule endoscope, Support system for endoscopic surgery, Position detecting system (motion capture), Wireless pump for artificial heart
<Sensors>
Magnetic field sensors, Strain sensors, Wireless sensors
<Materials>
Electrical steels of ultra low loss, Electrochemicaly produced materials (structure controlled in nano-scale)

Research Institute of Electrical Communication
ISHIYAMA, Kazushi, Professor Doctor of Engineering

[magnetic thin film]

Magnetic Applications and Magnetic Materials

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Features

The aim of our research are to obtain the high accuracy sensor system for the signals from the human body or electric devices and to obtain the system for approaching action to the human body by using the nano-scale controlled magnetic materials and by the development of the devices under the functions of the magnetics.
We studied the mechanism of obtaining the magnetic anisotropy of the magnetic thin films for the sensitive magnetic sensors. We obtained a non-metal probe for high frequency magnetic field, and confirmed the probe can measure the high frequency magnetic field with its phase information. In addition, 3D position detecting system using magnetic markers was studied to improve its position accuracy. The study about the magnetic actuator driven by the external magnetic field was carried out for biomimetic robots using the rotational magnetic field, and small wireless pumps were obtained and clarified for their application for an artificial heart-support pump.


Targeted Application(s)/Industry

<Medical Applications>
Motion system for capsule endoscope, Support system for endoscopic surgery, Position detecting system (motion capture), Wireless pump for artificial heart
<Sensors>
Magnetic field sensors, Strain sensors, Wireless sensors
<Materials>
Electrical steels of ultra low loss, Electrochemicaly produced materials (structure controlled in nano-scale)

Research Institute of Electrical Communication
ISHIYAMA, Kazushi, Professor Doctor of Engineering

[magnetism]

Hierarchy Control in Structure and Creation of Novel Properties in Nano Scale Materials

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Features
Crystals produced from the building blocks using a concept of geometrical materials, from the ubiquitous elements such as B, C, N, O, Si, Ge and 3-d elements show the following characteristics:
(1) Special properties resulting from the bonding nature and geometrical symmery.
(2) New properties expected from confinement and interface.
(3) A variety of phonons as phonon engineering.
(4) Interplay among phonons, itinerant electrons and magnons.
Materials are synthesized using the strategy of natural aboundant ubiquitous elements for safety. Novel properties can be expected for advanced electronic devices. The structure of new materials can accurately be determined by various experimental techniques.

Targeted Application(s)/Industry
New materials produced by employing a new concept beyond the conventional methods can promote a new materials science for future electronics. Our research covers nano materials consisting of organic to innorganic elements. Thermoelectric materials for energy conversion and high mobility materials via Dirac quantum statse will be avialable for future electronic materials.

WPI Advanced Institute for Materials Research
TANIGAKI, Katsumi, Professor Doctor of Engineering

Science of Next-Generation Higher-Order Functional Nano Metal Complex

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Features
We focus on high-order functional magnetic, conductivity, and optical properties, and dielectrics, which will be used in the next-generation devices, on the basis of "quantum effects and novel non-linearity". We are synthesizing high-order functional nano hybrid materials.

Targeted Application(s)/Industry
We have conducted materials research to realize "quantum computers", "optical computers", "large-capacity high-speed optical communications", "high-density magnetic memories", and "single-molecule memories" in the near future, and we are looking forward to collaborating with electronics industries.

WPI Advanced Institute for Materials Research / Department of Chemistry Graduate School of Science
YAMASHITA, Masahiro, Professor

Neutron scattering study on macroscopic quantum phenomena

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Features
In contrast to other scattering techniques, such as x-ray and electron diffractions, neutron scattering has the following advantages: 1) light atoms, such as H and Li, can be detected; 2) electron spins can be detected; 3) low energy excitations can be investigated. Using the neutron scattering technique, we search for macroscopic quantum phenomena in many-body electron systems, such as macroscopic singlet ground states in the quantum frustrated magnets and spin-fluctuation-mediated unconventional superconductors.

Targeted Application(s)/Industry
As noted above, neutron scattering can be used for investigating magnetic structure, spin dynamics, light atom positions in crystalline materials and their dynamics. Hence, this technique is very useful when those pieces of information are to be known.

Institute of Multidisciplinary Research for Advanced Materials
SATO, Taku J, Professor Doctor of Science

[magneto elastic materia]

Magnetic Applications and Magnetic Materials

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Features

The aim of our research are to obtain the high accuracy sensor system for the signals from the human body or electric devices and to obtain the system for approaching action to the human body by using the nano-scale controlled magnetic materials and by the development of the devices under the functions of the magnetics.
We studied the mechanism of obtaining the magnetic anisotropy of the magnetic thin films for the sensitive magnetic sensors. We obtained a non-metal probe for high frequency magnetic field, and confirmed the probe can measure the high frequency magnetic field with its phase information. In addition, 3D position detecting system using magnetic markers was studied to improve its position accuracy. The study about the magnetic actuator driven by the external magnetic field was carried out for biomimetic robots using the rotational magnetic field, and small wireless pumps were obtained and clarified for their application for an artificial heart-support pump.


Targeted Application(s)/Industry

<Medical Applications>
Motion system for capsule endoscope, Support system for endoscopic surgery, Position detecting system (motion capture), Wireless pump for artificial heart
<Sensors>
Magnetic field sensors, Strain sensors, Wireless sensors
<Materials>
Electrical steels of ultra low loss, Electrochemicaly produced materials (structure controlled in nano-scale)

Research Institute of Electrical Communication
ISHIYAMA, Kazushi, Professor Doctor of Engineering

[magneto-optical effect]

Spintronics Devices and Materials

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Features
Spintronics is a technology utilizing electron spin which provided magnetic sensor, nonvolatile magnetic memory, and so on. Our studies are as below.

Noble & Rare-earth free magnetic films with large perpendicular magnetic anisotropy. We achieved to develop various Mn-bases alloy films exhibiting high perpendicular magnetic anisotropy (Fig.1 ).
THz range observation of magnetization motion. We achieved to detect a motion of magnetization using pulse laser in time domain (Fig. 2).
Novel organic spin devices. We achieved to fabricate hybrid junction consisting of an organic layer sandwiched by two inorganic magnetic layers and to observe magnetoresistance effect.
Tunnel Magnetoresistive devices: We are developing TMR devices with Mn-Ga alloys films (Fig.3 ).

Targeted Application(s)/Industry
Magnetic memory and storage. Microwave and Terahertz wave. Magnetic sensors.
We hope to conduct collaborative research with a willing company for a practical application of these devices and materials in industry.

WPI Advanced Institute for Materials Research
MIZUKAMI, Shigemi, Professor Doctor of Engineering