Patents by Inventor Roy William Chantrell

Roy William Chantrell 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).

  • Magnetization reversal
    Patent number: 9773603
    Abstract: A method of magnetization reversal, time stable ferrimagnetic material, a product and a domain comprising said material, a system for magnetization reversal, and information storage. Therein, a ferrimagnetic material is one in which magnetic moments of the atoms on different sublattices are opposed, as in antiferromagnetism; however, in ferrimagnetic materials, the opposing moments are unequal and a spontaneous magnetization remains.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: September 26, 2017
    Assignee: RADBOUD UNIVERSITEIT NIJMEGEN
    Inventors: Theodorus Henricus Maria Rasing, Johan Mentink, Andrei Kirilyuk, Alexey Kimel, Richard Francis Llewelyn Evans, Roy William Chantrell, Thomas Andrew Ostler, Joseph Barker
  • Method and apparatus for determining curie temperature distribution of a sample of magnetic material
    Patent number: 9103729
    Abstract: Determining a Curie temperature (Tc) distribution of a sample comprising magnetic material involves subjecting the sample to an electromagnetic field, heating the sample over a range of temperatures, generating a signal representative of a parameter of the sample that changes as a function of changing sample temperature while the sample is subjected to the electromagnetic field, and determining the Tc distribution of the sample using the generated signal and a multiplicity of predetermined parameters of the sample.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: August 11, 2015
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Ganping Ju, Jason L. Pressesky, Roy William Chantrell, Xiaowei Wu, Xi Chen, Xiaobin Zhu, Yingguo Peng
  • Magnetization Reversal
    Publication number: 20140368303
    Abstract: A method of magnetization reversal, time stable ferrimagnetic material, a product and a domain comprising said material, a system for magnetization reversal, and information storage. Therein, a ferrimagnetic material is one in which magnetic moments of the atoms on different sublattices are opposed, as in antiferromagnetism; however, in ferrimagnetic materials, the opposing moments are unequal and a spontaneous magnetization remains.
    Type: Application
    Filed: June 23, 2014
    Publication date: December 18, 2014
    Inventors: Theodorus Henricus Maria Rasing, Johan Mentink, Andrei Kirilyuk, Alexey Kimel, Richard Francis Llewelyn Evans, Roy William Chantrell, Thomas Andrew Ostler, Joseph Barker