图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者:唐仁政 田荣璋
出版时间:2009-05
定 价:320元
图书ISBN:978-7-81105-831-4
出版单位:中南大学出版社
Guanghua Yu;Haifeng Li;Tao Yang;Fengwu Zhu Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
摘 要:<正> In order to study the magnetic properties and structure of very thin permalloy films, Ni81Fe19 films of 12nm in thicknesswere prepared by different instruments at an ultrahigh base vacuum and a lower base vacuum. The anisotropic magnetoresistance co-efficients (ΔR/R) of Ni81Fe19 (12nm) films reached 1.6% and 0.6%, and the coercivities were 127 and 334 A/m, respectively. X-rayphotoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were used to study the structure and surface chemical state. The ex-perimental results show that the films prepared at the ultrahigh base vacuum have a smoother surface, a bigger grain size and adenser structure with fewer defects than those prepared at the lower base vacuum.
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