Effects of exchange interaction and spin-fluctuation on the magnetic and magneto-optic properties of NdF3
Zhang Guo-Ying(张国营)a)†, Xia Tian(夏天)b), Zhang Xue-Long(张学龙)b), and Xue Liu-Ping(薛刘萍)a)
aDepartment of Physics, College of Science, China University of Mining and Technology, Xuzhou 221008, China; bCollege of Medical Mechanism, Shanghai University of Science and Technology, Shanghai 200093, China
Abstract The exchange interaction between the electrons in the different magnetic ions and the spin-fluctuation of the magnetic ions exist in the paramagnetic media NdF$_{3}$. The exchange interaction between the electrons in the different magnetic ions may be equivalent to an effective field $H_{in}$ that is in direct proportion to the magnetization M. The spin-fluctuation of the magnetic ions leads the coefficient of the effective field to vary with temperature. The effective field is given as H$_{\rm in} = - (0.75 + 0.22{\rm T})$ $\times 10^{^{ - 5}}$M in NdF$_{3}$. When the secondary crystal field effect is taken into account, the magnetic susceptibility and Verdet constant are calculated for NdF$_{3}$ by means of the effective field H$_{\rm in} $ and the applied field H$_e$. The calculated results are in agreement with the measured ones.
Received: 04 February 2008
Revised: 18 March 2008
Accepted manuscript online:
Fund: Project supported
by the Science and Technology Foundation of China University of
Mining and Technology (Grant No OK061066).
Cite this article:
Zhang Guo-Ying(张国营), Xia Tian(夏天), Zhang Xue-Long(张学龙), and Xue Liu-Ping(薛刘萍) Effects of exchange interaction and spin-fluctuation on the magnetic and magneto-optic properties of NdF3 2008 Chin. Phys. B 17 3093
Exchange couplings in magnetic films Liu Wei (刘伟), Liu Xiong-Hua (刘雄华), Cui Wei-Bin (崔伟斌), Gong Wen-Jie (龚文杰), Zhang Zhi-Dong (张志东). Chin. Phys. B, 2013, 22(2): 027104.
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