Magnetization steps in Pb_1−xCe_xS at 20mK

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• 作者：Gratens ; X. ; ter Haar ; E. ; Bindilatti ; V. ; Oliveira Jr ; N.F. ; Shapira ; Y. ; Golacki ; Z.
• 关键词：Diluted magnetic semiconductors ; Exchange constants ; Low-temperature magnetization ; Cluster model
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2001
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：May, 2001
• 卷：226
• 期：Part 2
• 页码：2036-2037
• 文件大小：71.5 K

摘要

The magnetization of Pb_1−xCe_xS single crystals was measured at 20mK and magnetic field upto 90kOe. Magnetization steps from two types of pairs were observed. The first has an isotropic exchange interaction with J=−0.32K. The second type of pairs gives a structured step which can be explained by an anisotropic exchange interaction. Cluster statistics suggests that both types are nearest-neighbor pairs.