Effects of exchange interaction and spin-fluctuation on the magnetic and magneto-optic properties of NdF3

• 来源期刊: 中国物理B(英文版)
• 关键词: exchange interaction spin-fluctuation magnetic and MO properties NdF3 crystal
• 年，卷（期）: 2008,（8）
• 页码范围: 3093-3096
• 页数: 4页
• 语种: 英文

摘要

The exchange interaction between the electrons in the different magnetic ions and the spin-fluctuation of the magnetic ions exist in the paramagnetic media NdF3. The exchange interaction between the electrons in the different magnetic ions may be equivalent to an effective field Hin 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 Hin = -(0.75+0.22T) × 10-5 M in NdF3. When the secondary crystal field effect is taken into account,the magnetic susceptibility and Verdet constant are calculated for NdF3 by means of the effective field Hin and the applied field He. The calculated results are in agreement with the measured ones.