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

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（8）
• 页码范围: 178-180
• 页数: 3页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/8/087803

摘要

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 =no (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.