Patents by Inventor Akiyoshi Itoh
Akiyoshi Itoh 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).
-
Patent number: 8345516Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.Type: GrantFiled: November 7, 2011Date of Patent: January 1, 2013Assignee: Stichting Katholieke UniversiteitInventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldermarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
-
Publication number: 20120257483Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.Type: ApplicationFiled: November 7, 2011Publication date: October 11, 2012Applicants: Medical CentreInventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldermarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
-
Patent number: 8054713Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.Type: GrantFiled: May 24, 2006Date of Patent: November 8, 2011Assignee: Stichting Katholieke UniversiteitInventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldemarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
-
Publication number: 20110058458Abstract: The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.Type: ApplicationFiled: May 24, 2006Publication date: March 10, 2011Applicant: Stichting Katholieke UniversiteitInventors: Theodorus Henricus Maria Rasing, Andrei Ivanovitch Kiriliouk, Alexey Voldermarovitsj Kimel, Claudiu Daniel Stanciu, Fredrik Hansteen, Akiyoshi Itoh, Arata Tsukamoto
-
Publication number: 20100209738Abstract: Disclosed is a thin film material including a substrate and an underlying layer formed on the substrate. A large number of recesses of an extremely small size are demonstrated in a surface of the underlying layer. On this surface of the underlying layer is formed a magnetic film or a non-magnetic film.Type: ApplicationFiled: February 18, 2010Publication date: August 19, 2010Applicant: NIHON UNIVERSITYInventors: Akiyoshi Itoh, Katsuji Nakagawa, Arata Tsukamoto
-
Publication number: 20090117410Abstract: Disclosed is a thin film material including a substrate (10) and an underlying layer (11) formed on the substrate. A large number of recesses of an extremely small size are demonstrated in a surface of the underlying layer (11). On this surface of the underlying layer is formed a magnetic film (12) or a non-magnetic film (12).Type: ApplicationFiled: February 25, 2005Publication date: May 7, 2009Applicant: NIHON UNIVERSITYInventors: Akiyoshi Itoh, Katsuji Nakagawa, Arata Tsukamoto
-
Patent number: 6707648Abstract: A magnetic element having an improved MR rate. The magnetic element 1 is made up of plural layered films of different compositions and exhibits a magneto-resistance effect that the magneto-resistance value is changed on application of a magnetic field. The magnetic element 1 includes a recess 11 for transmitting the current along the layering direction of the layered films. The current flows through the portion of the magnetic element 1 not having the recess 11 so as to have a component along the film layering direction A, with the result that electrons taking part in current conduction may be propagated as the electrons traverse the boundary surfaces of the plural layered films.Type: GrantFiled: May 18, 2001Date of Patent: March 16, 2004Assignee: Nih n UniversityInventors: Akiyoshi Itoh, Katsuji Nakagawa
-
Patent number: 6507197Abstract: An electrostatic force microscope wherein electrostatic force applied to the detector is determined through obtaining the field distribution on several different shaped detectors with the calculation of the voltage distribution near the detector with the Finite Element Method to direct the measurement of the absolute charge amount on surface under test so that one can define the differences between the analysis and the results from the parallel plate model. Of interest is how large the error in the charge detection occurs in conjunction with thickness change of dielectric materials to be tested. There is provided a detector with cantilever which has proper shape for the spatial resolution of 10&mgr; made out of nickel foil for an electrostatic force microscope and the electrostatic force which appeared on it has been calculated.Type: GrantFiled: October 30, 1998Date of Patent: January 14, 2003Assignee: Trek, Inc.Inventors: Akiyoshi Itoh, Katsuji Nakagawa, Manabu Tani, Toshio Uehara, Bruce T. Williams
-
Publication number: 20020030949Abstract: A magnetic element having an improved MR rate. The magnetic element 1 is made up of plural layered films of different compositions and exhibits a magneto-resistance effect that the magneto-resistance value is changed on application of a magnetic field. The magnetic element 1 includes a recess 11 for transmitting the current along the layering direction of the layered films. The current flows through the portion of the magnetic element 1 not having the recess 11 so as to have a component along the film layering direction A, with the result that electrons taking part in current conduction may be propagated as the electrons traverse the boundary surfaces of the plural layered films.Type: ApplicationFiled: May 18, 2001Publication date: March 14, 2002Inventors: Akiyoshi Itoh, Katsuji Nakagawa
-
Patent number: 6337478Abstract: An electrostatic force microscope for measuring electrostatic force of a sample under test including a detector comprising a cantilever arm having a tip formation at one end and located so that electrostatic force is induced at the tip due to electrostatic charge on the sample under test, an optical system for transforming bending of the cantilever arm due to electrostatic force induced at the tip into an electrical signal containing a frequency component of the electrostatic force induced at the detector tip, a source for applying bias voltage to the detector, a detector for detecting the frequency component of the electrostatic force induced at the detector tip so that a measurement of electrostatic force on the sample under test can be obtained, and an electrostatic shield operatively associated with the cantilever arm. The shield is located between the cantilever arm and the sample under test, in particular in close spaced relation to the arm.Type: GrantFiled: November 5, 1999Date of Patent: January 8, 2002Assignee: Trek, Inc.Inventors: Toshio Uehara, Akiyoshi Itoh, Katsuji Nakagawa, Manabu Tani, Bruce T. Williams
-
Patent number: 5160783Abstract: An epoxy resin-impregnated glass cloth sheet having an adhesive layer provided on at least one side of the surface thereof, characterized in that (A) said epoxy resin-impregnated glass cloth sheet is formed by impregnating glass cloth with a curable epoxy resin composition and curing it, said curable epoxy resin composition comprising an epoxy resin represented by the following structural formula (I), a brominated epoxy resin and a curing agent for epoxy resin in such an amount that the content of the epoxy resin represented by the following structural formula (I) is 5 to 50% by weight based on the amount of the entire epoxy resins and the content of bromine atom is 14 to 30% by weight based on the combined amount of the entire epoxy resins and the curing agent for epoxy resin; and (B) said adhesive layer is composed of a curable epoxy resin composition comprising an epoxy resin represented by the following structural formula (I), a brominated epoxy resin, an acrylonitrile/butadiene copolymer having carboxylType: GrantFiled: December 19, 1990Date of Patent: November 3, 1992Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Yousui Nemoto, Akiyoshi Itoh, Toshimi Kohmura, Yasuhiro Horiba