Patents by Inventor Jian-Ping Wang

Jian-Ping Wang 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).

  • Publication number: 20180366172
    Abstract: A magnetic device may include a composite free layer that includes a first sub-layer comprising at least one of a Co-based alloy, a Fe-based alloy, or a Heusler alloy; a second sub-layer comprising at least one of a Co-based alloy, a Fe-based alloy, or a Heusler alloy; and an intermediate sub-layer between the first sub-layer and the second sub-layer. The composite free layer exhibits a magnetic easy axis oriented out of a plane of the composite free layer.
    Type: Application
    Filed: October 11, 2017
    Publication date: December 20, 2018
    Inventors: Jian-Ping Wang, Junyang Chen, Mo Li
  • Publication number: 20180294078
    Abstract: A permanent magnet may include a Fe16N2 phase constitution.
    Type: Application
    Filed: June 8, 2018
    Publication date: October 11, 2018
    Inventors: Jian-Ping Wang, Shihai He, Yanfeng Jiang
  • Publication number: 20180287052
    Abstract: Articles including a fixing layer and a free layer including a layer including an FePd alloy. The free layer may include a composite layer including a perpendicular synthetic antiferromagnetic (p-SAF) structure. Techniques for forming and using articles including FePd alloy layers or p-SAF structures. Example articles and techniques may be usable for storage and logic devices.
    Type: Application
    Filed: December 1, 2017
    Publication date: October 4, 2018
    Inventors: Jian-Ping Wang, Delin Zhang
  • Patent number: 10072356
    Abstract: A magnetic material may include ??-Fe16(NxZ1-x)2 or a mixture of ??-Fe16N2 and ??-Fe16Z2, where Z includes at least one of C, B, or O, and x is a number greater than zero and less than one. In some examples, the magnetic material including ??-Fe16(NxZ1-x)2 or a mixture of ??-Fe16N2 and ??-Fe16Z2 may include a relatively high magnetic saturation, such as greater than about 219 emu/gram, greater than about 242 emu/gram, or greater than about 250 emu/gram. In addition, in some examples, the magnetic material including ??-Fe16(NxZ1-x)2 or a mixture of ??-Fe16N2 and ??-Fe16Z2 may include a relatively low coercivity. Techniques for forming the magnetic material are also described.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: September 11, 2018
    Assignee: Regents of the University of Minnesota
    Inventors: Jian-Ping Wang, Yanfeng Jiang, Md Aminul Mehedi
  • Publication number: 20180254836
    Abstract: Techniques are described for data transfer in spin-based systems where digital bit values are represented by magnetization states of magnetoresistive devices rather than voltages or currents. For data transmission, a spin-based signal is converted to an optical signal and transmitted via an optical transport. For data reception, the optical signal is received via the optical transport and converted back to a spin-based signal. Such data transfer may not require an intervening conversion of the spin-based signal to charge-based signal that relies on voltages or currents to represent digital bit values. In addition, techniques are described to use magnetoresistive devices to control the amount of current or voltage that is delivered, where the magnetization state of the magnetoresistive device is set by an optical signal.
    Type: Application
    Filed: May 7, 2018
    Publication date: September 6, 2018
    Inventors: Mo Li, Jian-Ping Wang
  • Patent number: 10068689
    Abstract: A permanent magnet may include a Fe16N2 phase constitution. In some examples, the permanent magnet may be formed by a technique that includes straining an iron wire or sheet comprising at least one iron crystal in a direction substantially parallel to a <001> crystal axis of the iron crystal; nitridizing the iron wire or sheet to form a nitridized iron wire or sheet; annealing the nitridized iron wire or sheet to form a Fe16N2 phase constitution in at least a portion of the nitridized iron wire or sheet; and pressing the nitridized iron wires and sheets to form bulk permanent magnet.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: September 4, 2018
    Assignee: Regents of the University of Minnesota
    Inventors: Jian-Ping Wang, Shihai He, Yanfeng Jiang
  • Publication number: 20180203077
    Abstract: An article may include a substantially perpendicularly magnetized free layer having a first magnetic orientation in the absence of an applied magnetic field. The article may also include a spin Hall channel layer configured to conduct a spin current configured to subject the perpendicularly magnetized free layer to a magnetic switching torque and a substantially in-plane magnetized bias layer configured to bias the substantially perpendicularly magnetized free layer to a second magnetic orientation. The second magnetic orientation is different than the first magnetic orientation and is out of a plane of the substantially perpendicularly magnetized free layer.
    Type: Application
    Filed: March 12, 2018
    Publication date: July 19, 2018
    Inventors: Jian-Ping Wang, Angeline Klemm Smith, Mahdi Jamali, Zhengyang Zhao
  • Patent number: 10002694
    Abstract: An inductor may include a magnetic material that may include ??-Fe16(NxZ1-x)2 or ??-Fe8(NxZ1-x), or a mixture of at least one of ??-Fe16N2 or ??-Fe8N and at least one of ??-Fe16Z2 or ??-Fe8Z, where Z includes at least one of C, B, or O, and x is a number greater than zero and less than one. In some examples, the magnetic material may include a relatively high magnetic saturation, such as greater than about 200 emu/gram, greater than about 242 emu/gram, or greater than about 250 emu/gram. In addition, in some examples, the magnetic material may include a relatively low coercivity or magnetocrystalline anisotropy. Techniques for forming the inductor including the magnetic material are also described.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: June 19, 2018
    Assignee: Regents of the University of Minnesota
    Inventors: Jian-Ping Wang, Yanfeng Jiang, Md Aminul Mehedi
  • Publication number: 20180166500
    Abstract: This disclosure describes an example device that includes a first contact line, a second contact line, a spin-orbital coupling channel, and a magnet. The spin-orbital coupling channel is coupled to, and is positioned between, the first contact line and second contact line. The magnet is coupled to the spin-orbital coupling channel and positioned between the first contact line and the second contact line. A resistance of the magnet and spin-orbital coupling channel is a unidirectional magnetoresistance.
    Type: Application
    Filed: December 12, 2017
    Publication date: June 14, 2018
    Inventors: Jian-Ping Wang, Yang Lv, Mahdi Jamali
  • Publication number: 20180166197
    Abstract: A material may include at least one of BixSe(1-x), BixTe(1-x), or SbxTe(1-x), where x is greater than 0 and less than 1. In some examples, the material exhibits a Spin Hall Angle of greater than 3.5 at room temperature. The disclosure also describes examples of devices that include a spin-orbit torque generating layer, in which the spin-orbit torque generating layer includes at least one of BixSe(1-x), BixTe(1-x), or SbxTe(1-x), where x is greater than 0 and less than 1. In some examples, the spin-orbit torque generating layer exhibits a Spin Hall Angle of greater than 3.5 at room temperature.
    Type: Application
    Filed: December 8, 2017
    Publication date: June 14, 2018
    Inventors: Jian-Ping Wang, Mahendra DC, Mahdi Jamali, Andre Mkhoyan, Danielle Hickey
  • Patent number: 9994949
    Abstract: A method may include annealing a material including iron and nitrogen in the presence of an applied magnetic field to form at least one Fe16N2 phase domain. The applied magnetic field may have a strength of at least about 0.2 Tesla (T).
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: June 12, 2018
    Assignees: Regents of the University of Minnesota, UT-Battelle, LLC
    Inventors: Michael P. Brady, Orlando Rios, Yanfeng Jiang, Gerard M. Ludtka, Craig A. Bridges, Jian-Ping Wang, Xiaowei Zhang, Lawrence F. Allard, Edgar Lara-Curzio
  • Publication number: 20180156672
    Abstract: This disclosure describes various examples of spintronic temperature sensors. The example temperature sensors may be discrete or used to adaptively control operation of a component such as an integrated circuit (IC). In one example, an electronic device comprises a spintronic component configured such that the conductance of the spintronic component is based on sensed temperature. In one example, circuitry coupled to the spintronic component is configured to generate an electrical signal indicative of the sensed temperature based on the conductance of the spintronic component.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 7, 2018
    Inventors: Jian-Ping Wang, Yanfeng Jiang
  • Publication number: 20180127865
    Abstract: Nanoparticle deposition systems including one or more of: a hollow target of a material; at least one rotating magnet providing a magnetic field that controls movement of ions and crystallization of nanoparticles from released atoms; a nanoparticle collection device that collects crystallized nanoparticles on a substrate, wherein relative motion between the substrate and at least a target continuously expose new surface areas of the substrate to the crystallized nanoparticles; a hollow anode with a target at least partially inside the hollow anode; or a first nanoparticle source providing first nanoparticles of a first material and a second nanoparticle source providing second nanoparticles of a second material.
    Type: Application
    Filed: September 22, 2017
    Publication date: May 10, 2018
    Inventors: Jian-Ping Wang, Shihai He
  • Patent number: 9967038
    Abstract: Techniques are described for data transfer in spin-based systems where digital bit values are represented by magnetization states of magnetoresistive devices rather than voltages or currents. For data transmission, a spin-based signal is converted to an optical signal and transmitted via an optical transport. For data reception, the optical signal is received via the optical transport and converted back to a spin-based signal. Such data transfer may not require an intervening conversion of the spin-based signal to charge-based signal that relies on voltages or currents to represent digital bit values. In addition, techniques are described to use magnetoresistive devices to control the amount of current or voltage that is delivered, where the magnetization state of the magnetoresistive device is set by an optical signal.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: May 8, 2018
    Assignee: Regents of the University of Minnesota
    Inventors: Mo Li, Jian-Ping Wang
  • Publication number: 20180100227
    Abstract: A method may include annealing a material including iron and nitrogen in the presence of an applied magnetic field to form at least one Fe16N2 phase domain. The applied magnetic field may have a strength of at least about 0.2 Tesla (T).
    Type: Application
    Filed: December 13, 2017
    Publication date: April 12, 2018
    Inventors: Michael P. Brady, Orlando Rios, Yanfeng Jiang, Gerard M. Ludtka, Craig A. Bridges, Jian-Ping Wang, Xiaowei Zhang, Lawrence F. Allard, Edgar Lara-Curzio
  • Patent number: 9927431
    Abstract: A biosensor includes a magnetic structure having grooved surface to biologically bond magnetic labels to a biological substance within the grooves. The grooves are positioned within the magnetic structure so that stray magnetic fields from the magnetic structure magnetize magnetic labels within the groove. The magnetic labels may be magnetic nanoparticles or magnetic microbeads. The techniques may reduce or eliminate the usage of any external magnetic field generator, e.g., electromagnets or current lines.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 27, 2018
    Assignee: Regents of the University of Minnesota
    Inventors: Jian-Ping Wang, Yuanpeng Li, Wang Yi
  • Publication number: 20180025841
    Abstract: Techniques are disclosed concerning applied magnetic field synthesis and processing of iron nitride magnetic materials. Some methods concern casting a material including iron in the presence of an applied magnetic field to form a workpiece including at least one ironbased phase domain including uniaxial magnetic anisotropy, wherein the applied magnetic field has a strength of at least about 0.01 Tesla (T). Also disclosed are workpieces made by such methods, apparatus for making such workpieces and bulk materials made by such methods.
    Type: Application
    Filed: July 22, 2015
    Publication date: January 25, 2018
    Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA
    Inventors: Jian-Ping WANG, YanFeng JIANG
  • Patent number: 9864218
    Abstract: Techniques are described for a device that includes an optical channel configured to transport an optical signal. The device further includes a magnetic material with low optical absorption through which a portion of the optical signal is configured to flow. The magnetic material is configured to receive an electrical signal that sets a magnetization state of the magnetic material. The magnetic material is further configured to modulate, based on the magnetization state, the portion of the optical signal flowing though the magnetic material.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: January 9, 2018
    Assignee: Regents of the University of Minnesota
    Inventors: Jian-Ping Wang, Mo Li
  • Publication number: 20180001385
    Abstract: Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one a?-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one a?-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.
    Type: Application
    Filed: January 22, 2016
    Publication date: January 4, 2018
    Inventors: Jian-Ping WANG, YanFeng JIANG
  • Publication number: 20170365381
    Abstract: A permanent magnet may include a Fe16N2 phase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including Fe16N2 to introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including Fe16N2, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an Fe16N2 phase with preserved strain also is disclosed.
    Type: Application
    Filed: January 22, 2016
    Publication date: December 21, 2017
    Inventors: Jian-Ping WANG, YanFeng JIANG