MAGNETIC RECORDING MEDIA WITH SOFT MAGNETIC UNDERLAYERS

MAGNETIC RECORDING MEDIA WITH SOFT MAGNETIC UNDERLAYERS

Provided herein, is an apparatus that includes a nonmagnetic substrate having a surface; and a plurality of overlying thin film layers forming a layer stack on the substrate surface. The layer stack includes a magnetically hard perpendicular magnetic recording layer structure and an underlying soft...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ROU SHANGHSIEN, TANG LI, LEE LI-LIEN, NOLAN THOMAS P, XU WEILU, ZHENG YOUFENG, LIU CONNIE CHUNLING, XUE JIANHUA
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Beschreibung
Zusammenfassung:Provided herein, is an apparatus that includes a nonmagnetic substrate having a surface; and a plurality of overlying thin film layers forming a layer stack on the substrate surface. The layer stack includes a magnetically hard perpendicular magnetic recording layer structure and an underlying soft magnetic underlayer (SUL), wherein the sum of a magnetic thickness of the layer stack is a magnetic thickness of up to about 2 memu/cm̂2.