Patents by Inventor Kazuya Harii

Kazuya Harii has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Magnetic sensor and magnetic memory
    Patent number: 8686525
    Abstract: The invention relates to a magnetic sensor and a magnetic memory which sense magnetic information held by a ferromagnetic body without a current flowing through the ferromagnetic body. The magnetic sensor and magnetic memory use a magnetoresistive effect generated in a current that flows through a metal layer along an interface, on at least the interface side, with a ferromagnetic dielectric layer and said metal layer being joined through said interface.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: April 1, 2014
    Assignee: Toroku University
    Inventors: Eiji Saitoh, Hiroyasu Nakayama, Kazuya Harii
  • Method for changing spin relaxation, method for detecting spin current and spintronics device using spin relaxation
    Patent number: 8564293
    Abstract: The invention relates to a method for changing spin relaxation, a method for detecting a spin current, and a spintronic device using spin relaxation, and spin relaxation is changed through injection of a spin current. A spin current 4 is injected into a material 1 in a certain spin state, so that the spin relaxation time can be controlled.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: October 22, 2013
    Assignee: Tohoku University
    Inventors: Kazuya Ando, Kazuya Harii, Kohei Sasage, Eiji Saitoh
  • Spin current thermal conversion device and thermoelectric conversion device
    Patent number: 8203191
    Abstract: The invention relates to a spin current thermal conversion device and a thermoelectric conversion device, with which a spin current is thermally generated, and its concrete application is realized. A temperature gradient creating means which creates a temperature gradient in a thermal spin current generating member is provided in a thermal spin current generating member made of either a ferromagnetic member or a conductive member containing a ferromagnetic substance.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: June 19, 2012
    Assignee: Keio University
    Inventors: Kenichi Uchida, Kazuya Harii, Yosuke Kajiwara, Eiji Saitoh
  • MAGNETIC SENSOR AND MAGNETIC MEMORY
    Publication number: 20120012956
    Abstract: The invention relates to a magnetic sensor and a magnetic memory which sense magnetic information held by a ferromagnetic body without a current flowing through the ferromagnetic body. The magnetic sensor and magnetic memory use a magnetoresistive effect generated in a current that flows through a metal layer along an interface, on at least the interface side, with a ferromagnetic dielectric layer and said metal layer being joined through said interface.
    Type: Application
    Filed: March 24, 2010
    Publication date: January 19, 2012
    Applicant: TOHOKU UNIVERSITY
    Inventors: Eiji Saitoh, Hiroyasu Nakayama, Kazuya Harii
  • SPIN CURRENT THERMAL CONVERSION DEVICE AND THERMOELECTRIC CONVERSION DEVICE
    Publication number: 20100276770
    Abstract: The invention relates to a spin current thermal conversion device and a thermoelectric conversion device, with which a spin current is thermally generated, and its concrete application is realized. A temperature gradient creating means which creates a temperature gradient in a thermal spin current generating member is provided in a thermal spin current generating member made of either a ferromagnetic member or a conductive member containing a ferromagnetic substance.
    Type: Application
    Filed: November 17, 2008
    Publication date: November 4, 2010
    Applicant: KEIO UNIVERSITY
    Inventors: Kenichi Uchida, Kazuya Harii, Yosuke Kajiwara, Eiji Saitoh
  • METHOD FOR CHANGING SPIN RELAXATION, METHOD FOR DETECTING SPIN CURRENT AND SPINTRONICS DEVICE USING SPIN RELAXATION
    Publication number: 20100097063
    Abstract: The invention relates to a method for changing spin relaxation, a method for detecting a spin current, and a spintronic device using spin relaxation, and spin relaxation is changed through injection of a spin current. A spin current 4 is injected into a material 1 in a certain spin state, so that the spin relaxation time can be controlled.
    Type: Application
    Filed: March 14, 2008
    Publication date: April 22, 2010
    Applicant: KEIO UNIVERSITY
    Inventors: Kazuya Ando, Kazuya Harii, Kohei Sasage, Eiji Saitoh
  • Magnetic ring unit and magnetic memory device
    Patent number: 7002839
    Abstract: The present invention relates to a magnetic ring unit and a magnetic memory device; an object of the invention is to control the direction of rotation of the magnetic flux freely and with high reproducibility in a simple structure without using a thermal process such as pinning; and a magnetic ring unit is formed of a magnetic ring in eccentric ring form where the center of the inner diameter is located at a decentered position relative to the center of the outer diameter.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: February 21, 2006
    Assignee: Keio University
    Inventors: Makoto Kawabata, Kazuya Harii, Eiji Saitoh, Hideki Miyajima
  • Magnetic ring unit and magnetic memory device
    Publication number: 20040213039
    Abstract: The present invention relates to a magnetic ring unit and a magnetic memory device; an object of the invention is to control the direction of rotation of the magnetic flux freely and with high reproducibility in a simple structure without using a thermal process such as pinning; and a magnetic ring unit is formed of a magnetic ring in eccentric ring form where the center of the inner diameter is located at a decentered position relative to the center of the outer diameter.
    Type: Application
    Filed: April 20, 2004
    Publication date: October 28, 2004
    Applicant: KEIO UNIVERSITY
    Inventors: Makoto Kawabata, Kazuya Harii, Eiji Saitoh, Hideki Miyajima