Patent ID: 7864473
Filing Date: 2011-01-04
Classification: B82Y,G11B

Abstract:
1. A magnetic recording system comprising: a magnetic recording medium including a substrate, a first ferromagnetic layer formed on said substrate, a nonmagnetic layer formed on said first ferromagnetic layer, and a second ferromagnetic layer formed on said nonmagnetic layer; a magnetic pole for applying a magnetic field H to invert a magnetizing direction of said first ferromagnetic layer; and means for applying a positive or a negative voltage V between a metallic probe and said magnetic recording medium, wherein a coercivity Hc wherein a quantum well level is formed in said nonmagnetic layer formed between said first and second ferromagnetic layers; wherein said magnetic field H changes said magnetizing direction of said first ferromagnetic layer to a direction of an applied magnetic field; wherein applying said positive or negative voltage V changes an energy of said quantum well level between said first and second ferromagnetic layers, thereby inducing an exchange magnetic field H wherein said magnetic field H and said exchange magnetic field H