Patents by Inventor Joshua Hockel

Joshua Hockel 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).

  • Devices and methods for controlling magnetic anisotropy with localized biaxial strain in a piezoelectric substrate
    Patent number: 9685214
    Abstract: Devices and methods for controlling magnetic anisotropy and orientation of magnetic single domain structures between stable states are provided based on piezoelectric thin films and patterned electrodes. By using patterned electrodes, piezoelectric strain is manipulated to achieve a highly localized biaxial strain in a piezoelectric substrate and rotate the magnetic anisotropy of magnetic materials. Reorientation of a magnetic single domain between different stable states is accomplished by pulsing voltage across pairs of electrodes. Since only a small region surrounding the electrodes is strained, the methods can be applied to arrays of indexed magnetic elements and to piezoelectric thin films clamped to silicon base substrates.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: June 20, 2017
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Christopher S. Lynch, Jizhai Cui, Joshua Hockel, Gregory P. Carman
  • Magnetoelectric control of superparamagnetism
    Patent number: 9355764
    Abstract: A magnetoelectric composite device having a free (i.e. switchable) layer of ferromagnetic nanocrystals mechanically coupled a ferroelectric single crystal substrate is presented, wherein application of an electrical field on the composite switches the magnetic state of the switchable layer from a superparamagnetic state having no overall net magnetization to a substantially single-domain ferromagnetic state.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 31, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sarah H. Tolbert, Gregory P. Carman, Scott Keller, Laura Schelhas, Hyungsuk Kim, Joshua Hockel
  • DEVICES AND METHODS FOR CONTROLLlNG MAGNETIC ANISTROPY WITH LOCALIZED BIAXIAL STRAIN IN A PIEZOELECTRIC SUBSTRATE
    Publication number: 20160005949
    Abstract: Devices and methods for controlling magnetic anisotropy and orientation of magnetic single domain structures between stable states are provided based on piezoelectric thin films and patterned electrodes. By using patterned electrodes, piezoelectric strain is manipulated to achieve a highly localized biaxial strain in a piezoelectric substrate and rotate the magnetic anisotropy of magnetic materials. Reorientation of a magnetic single domain between different stable states is accomplished by pulsing voltage across pairs of electrodes. Since only a small region surrounding the electrodes is strained, the methods can be applied to arrays of indexed magnetic elements and to piezoelectric thin films clamped to silicon base substrates.
    Type: Application
    Filed: June 15, 2015
    Publication date: January 7, 2016
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Christopher S. Lynch, Jizhai Cui, Joshua Hockel, Gregory P. Carman
  • MAGNETOELECTRIC CONTROL OF SUPERPARAMAGNETISM
    Publication number: 20140197910
    Abstract: A magnetoelectric composite device having a free (i.e. switchable) layer of ferromagnetic nanocrystals mechanically coupled a ferroelectric single crystal substrate is presented, wherein application of an electrical field on the composite switches the magnetic state of the switchable layer from a superparamagnetic state having no overall net magnetization to a substantially single-domain ferromagnetic state.
    Type: Application
    Filed: January 14, 2014
    Publication date: July 17, 2014
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sarah H. Tolbert, Gregory P. Carman, Scott Keller, Laura Schelhas, Hyungsuk Kim, Joshua Hockel