Voltage-Controlled Surface Magnetization of Itinerant Ferromagnet Ni_(1-x)Cu_x

Details Voltage-Controlled Surface Magnetization of Itinerant Ferromagnet Ni_(1-x)Cu_x Voltage-Controlled Surface Magnetization of Itinerant Ferromagnet Ni_(1-x)Cu_x

2008-12-06

arxiv.org/abs/0812.1309v1

Phys. Rev. B.78, 012405 (2008)

Physics

Condensed Matter

Materials Science

4 pages; 2 figures; submitted to PRL February 16th 2008; transferred to PRB June 21st 2008; published July 15th 2008

Scientific paper

10.1103/PhysRevB.78.012405

We argue that surface magnetization of a metallic ferromagnet can be turned on and off isothermally by an applied voltage. For this, the material's electron subsystem must be close enough to the boundary between para- and ferromagnetic regions on the electron density scale. For the 3d series, the boundary is between Ni and Cu, which makes their alloy a primary candidate. Using Ginzburg-Landau functional, which we build from Ni_(1-x)Cu_x empirical properties, ab-initio parameters of Ni and Cu, and orbital-free LSDA, we show that the proposed effect is experimentally observable.

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