CPP reader with phase detection of magnetic resonance for read-back

CPP reader with phase detection of magnetic resonance for read-back

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 di...

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Bibliographische Detailangaben
Hauptverfasser: Kaka, Shehzaad, Covington, Mark William, Gokemeijer, Nils Jan, Seigler, Michael Allen
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung: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.