| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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
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| Cite this article: |
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HU Feng, ZHANG Guo-Ying, YANG Dan et al 2013 Chin. Phys. Lett. 30 087803 |
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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.
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Received: 23 April 2013
Published: 21 November 2013
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| PACS: |
78.20.Ls
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(Magneto-optical effects)
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76.60.Jx
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(Effects of internal magnetic fields)
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75.30.Et
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(Exchange and superexchange interactions)
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