The Effect of Spin Fluctuations on the Exchange Field in Pr:YIG Crystal at Low Temperature
HU Feng1, ZHANG Guo-Ying1**, YANG Dan1, ZHANG Xue-Long2, XUE Liu-Ping1, ZHANG Lei1
1Department of Physics, College of Science, China University of Mining and Technology, Xuzhou 221008 2College of Medical Mechanism, Shanghai University of Science and Technology, Shanghai 200093
Abstract：Based on the temperature dependence of spin fluctuations of magnetic ions, the exchange field Hexch acting on the rare-earth ions in Pr-substituted yttrium iron garnet (Pr:YIG) is modified, which is expressed as Hexch=n0(1+γT+βeωT)MYIG. By means of the improved exchange field, the magnetic and magneto-optical properties of Pr:YIG are calculated. The calculated results are in good agreement with the experimental data in the temperature range of 4.2–300 K. Our study implies that the spin fluctuations of magnetic ions have an important influence on the magnetic and magneto-optical properties of Pr:YIG at low temperature.
. [J]. 中国物理快报, 2013, 30(8): 87803-087803.
HU Feng, ZHANG Guo-Ying, YANG Dan, ZHANG Xue-Long, XUE Liu-Ping, ZHANG Lei. The Effect of Spin Fluctuations on the Exchange Field in Pr:YIG Crystal at Low Temperature. Chin. Phys. Lett., 2013, 30(8): 87803-087803.
2013, Vol. 30 
