Seagate Technology Incorporated

Shehzaad Kaka

Michael Allen Seigler

Mark William Covington

Nils Jan Gokemeijer

An apparatus includes a current perpendicular to the plane sensing element, a DC current source connected to the sensing element, a microwave AC current source connected to supply AC current to the sensing element, and a detector for measuring a voltage representative of phase difference between the AC current and AC voltage across the multilayer structure when the sensing element is subjected to a magnetic field. A method for sensing a magnetic field is also provided.

High SNR CPP reader using high frequency standing wave interference detection

An apparatus includes a magnetically biased multilayer structure having a reference layer and a free layer separated by a spacer layer; a DC current source connected to the multilayer structure; an AC current source connected to the multilayer structure; and a phase detector for measuring a phase difference between an AC current and a voltage across the multilayer structure. A method performed by the apparatus is also provided.

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Pittsburgh, PA, United States of America

Shehzaad Kaka