Patents by Inventor Ioana Firastrau

Ioana Firastrau 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).

  • Spin-transfer torque oscillator
    Patent number: 8063709
    Abstract: The invention relates to a method of operating a spin-transfer torque structure to generate voltage oscillations, said structure comprising a first layer of magnetic material having a fixed magnetization vector, a spacer of non magnetic material and a second layer of magnetic material having a free magnetization vector. The method includes the application of a current (jop) through said structure and a magnetic field (Hext) in the plane of the second layer. It makes use of a region of bistability and hysteretic behaviour to trigger and stop the voltage oscillations.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: November 22, 2011
    Assignee: Centre National de la Recherche Scientifique
    Inventors: Ioana Firastrau, Ursula Ebels, Bernard Dieny
  • SPIN-TRANSFER TORQUE OSCILLATOR
    Publication number: 20100039181
    Abstract: The invention relates to a method of operating a spin-transfer torque structure to generate voltage oscillations, said structure comprising a first layer of magnetic material having a fixed magnetization vector, a spacer of non magnetic material and a second layer of magnetic material having a free magnetization vector. The method includes the application of a current (jop) through said structure and a magnetic field (Hext) in the plane of the second layer. It makes use of a region of bistability and hysteretic behaviour to trigger and stop the voltage oscillations.
    Type: Application
    Filed: February 21, 2007
    Publication date: February 18, 2010
    Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE
    Inventors: Ioana Firastrau, Ursula Ebels, Bernard Dieny