Patents by Inventor Philippe P. Lecoeur

Philippe P. Lecoeur 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).

  • Magnetic devices and sensors based on perovskite manganese oxide materials
    Patent number: 5792569
    Abstract: A tri-layer thin film magnetoresistive device using doped perovskite manganate thin films as ferromagnetic elements, wherein a current is transported through the tri-layer structure, is disclosed. A large magnetoresistance change of about a factor of two is obtained in a low magnetic field, less than 150 Oe, which is close to the coercivity of the material of the elements. This device demonstrates that low-field spin-dependent transport in the manganates can be accomplished and that the magnitude of the resulting magnetoresistance is suitable for magnetoresistive field sensor applications.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: August 11, 1998
    Assignee: International Business Machines Corporation
    Inventors: Jonathan Zanhong Sun, Arunava Gupta, Gang Xiao, Philip Louis Trouilloud, Philippe P. Lecoeur