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deadseazhu(金币+10):谢谢了 2010-05-27 19:00:01
正的，具体可以见
J. Appl. Phys. 97, 10C906 (2005); doi:10.1063/1.1848355 (3 pages)
Magnetostriction effect of amorphous CoFeB thin films and application in spin-dependent tunnel junctions
Dexin Wang,
Cathy Nordman,
Zhenghong Qian,
James M. Daughton,
and John Myers
NVE Corporation, 11409 Valley View Road, Eden Prairie, Minnesota 55344 Map This map
(published online 5 May 2005)
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CoFeB thin films and magnetic tunnel junctions using them are studied for magnetostriction effect. The single-layer films were sputter deposited with excellent soft magnetic properties including a high saturation magnetization of 1.5 T, a near-zero hard axis coercivity, a low easy axis coercivity of 2.0 Oe, and an induced magnetic anisotropy field of 32 Oe. The saturation magnetostriction constant is measured to be 31 ppm. Magnetic tunnel junctions (MTJs) were fabricated and tested for potential strain gauge applications. The gauge factor for the magnetostrictive MTJs, a measure of strain sensitivity, is many times of the best piezoresistive devices. |
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