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CoCrPt垂直磁记录介质磁化翻转特征的微磁学模拟-中国有色金属学报.PDF
18 9 2008 9
Vol.18 No.9 The Chinese Journal of Nonferrous Metals Sep. 2008
1004-0609(2008)09-1664-05
CoCrPt
( 430074)
CoCrPt
O 484143 A
Micromagnetic simulation of magnetization reversal in
CoCrPt perpendicular media
LI Peng, WU Bao-lei, CHENG Xiao-min, YANG Xiao-fei
(Department of Electronic Science and Technology, Huazhong University of Science and Technology,
Wuhan 430074, China)
Abstract: The magnetization reversal processes and coercivities of the continuous and granular-type films were studied
with fine element micromagnetic method. By simulating the magnetization reversal processes of two kinds of media, the
magnetizations in continuous film and granular-type medium are coherent and incoherent, respectively, because the
magnetization in film alternate up and down before the domains reversals. Further analysis of the exchange energies,
magnetocrystalline anisotropy energies, Zeeman energies and demagnetizing energies show that the demagnetizing field
is the main factor to decide the coercivity in medium. The granular-type film has a smaller demagnetizing field than the
continuous film, thus it shows larger switching field and has great potential in high density perpendicular magnetic
recording technology.
Key words: granular-type film; continuous film; micromagnetics; coercivity
19 1982 LEE[4]
VALDEMAR1976
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