The Effect of Spin Fluctuations on the Exchange Field in Pr:YIG Crystal at Low Temperature

Based on the temperature dependence of spin fluctuations of magnetic ions, the exchange held H sub(exch) acting on the rare-earth ions in Pr-substituted yttrium iron garnet (Pr:YIG) is modified, which is expressed as H sub(exch) = n sub(0) (1 + gamma T + beta e super(wT))M sub(YIG). By means of the...

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Bibliographic Details
Published in:Chinese physics letters 2013-08, Vol.30 (8), p.87803-1-087803-3
Main Authors: Hu, Feng, Zhang, Guo-Ying, Yang, Dan, Zhang, Xue-Long, Xue, Liu-Ping, Zhang, Lei
Format: Article
Language:English
Subjects:
Crystals
Exchange
Fluctuation
Ion exchangers
Magnetic properties
Mathematical analysis
Rare earth metals
Yttrium-iron garnet
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Summary:Based on the temperature dependence of spin fluctuations of magnetic ions, the exchange held H sub(exch) acting on the rare-earth ions in Pr-substituted yttrium iron garnet (Pr:YIG) is modified, which is expressed as H sub(exch) = n sub(0) (1 + gamma T + beta e super(wT))M sub(YIG). By means of the improved exchange held, the magnetic and magneto-optical properties of Pr:YIG are calculated. The calculated results are in good agreement with the experimental data in the tempera ture 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.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/30/8/087803