Open AccessTuning anomalous Hall conductivity in L1 FePt films by long range chemical ordering
Author(s) -
Maolin Chen,
Zhong Shi,
Wenjin Xu,
Xixiang Zhang,
Juan Du,
Shiming Zhou
Publication year - 2011
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3556616
Subject(s) - condensed matter physics , hall conductivity , hall effect , ferromagnetism , materials science , conductivity , electrical resistivity and conductivity , magnetization , atmospheric temperature range , range (aeronautics) , coupling (piping) , chemistry , physics , metallurgy , magnetic field , thermodynamics , quantum mechanics , composite material
For L10 FePt films, the anomalous Hall conductivity σ xy=-a σxx-b, where a=a0f(T), b=b 0f(T), and f (T) is the temperature dependence factor of the spontaneous magnetization. With increasing chemical long range ordering S, a0 changes its sign accompanied by a reduction of its magnitude and b0 increases monotonically. The spin-orbit coupling strength is suggested to increase with increasing S. As an approach, the long range chemical ordering can be used to control the anomalous Hall effect in ferromagnetic alloy films. © 2011 American Institute of Physics
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