Patents by Inventor Liliana Prejbeanu

Liliana Prejbeanu 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-valve or tunnel-junction radio-frequency oscillator, process for adjusting the frequency of such an oscillator and network consisting of a plurality of such oscillators
    Patent number: 8542072
    Abstract: A radio-frequency oscillator incorporates a magnetoresistive device within which an electron current is able to flow. The device includes a stack including: a magnetic trapped layer, the magnetization of which is of substantially fixed direction; a magnetic free layer; and a non-magnetic intermediate layer-interposed between the free layer and the trapped layer. The oscillator also includes a mechanism capable of making an electron current flow in the layers constituting the stack and in a direction perpendicular to the plane which contains the layers. At least the free layer is devoid of any material at its center. The electron current density flowing through the stack is capable of generating a magnetization in the free layer in a micromagnetic configuration in the shape of a skewed vortex flowing in the free layer around the center of the free layer.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: September 24, 2013
    Assignee: Commissariat a l'Energie Automique et aux Energies Alternatives
    Inventors: Bernard Dieny, Marie-Claire Cyrille, Ursula Ebels, Liliana Prejbeanu
  • SPIN-VALVE OR TUNNEL-JUNCTION RADIO-FREQUENCY OSCILLATOR, PROCESS FOR ADJUSTING THE FREQUENCY OF SUCH AN OSCILLATOR AND NETWORK CONSISTING OF A PLURALITY OF SUCH OSCILLATORS
    Publication number: 20120075031
    Abstract: A radio-frequency oscillator incorporates a magnetoresistive device within which an electron current is able to flow. The device includes a stack including: a magnetic trapped layer, the magnetization of which is of substantially fixed direction; a magnetic free layer; and a non-magnetic intermediate layer-interposed between the free layer and the trapped layer. The oscillator also includes a mechanism capable of making an electron current flow in the layers constituting the stack and in a direction perpendicular to the plane which contains the layers. At least the free layer is devoid of any material at its center. The electron current density flowing through the stack is capable of generating a magnetization in the free layer in a micromagnetic configuration in the shape of a skewed vortex flowing in the free layer around the center of the free layer.
    Type: Application
    Filed: September 26, 2011
    Publication date: March 29, 2012
    Inventors: Bernard Dieny, Marie-Claire Cyrille, Ursula Ebels, Liliana Prejbeanu