Distant-neighbors exchange constants in Cd_1−xMn_xSe from magnetization steps

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• 作者：Cajacuri ; R.A. ; Gratens ; X. ; ter Haar ; E. ; Bindilatti ; V. ; Oliveira Jr ; N.F. ; Shapira ; Y. ; Golacki ; Z.
• 关键词：75.30.Et ; 75.50.Ee ; 75.50.Pp ; 75.60.Ej ; Diluted magnetic semiconductors ; Exchange constants ; Low-temperature magnetization ; Cluster model ; Cd_1&minus ; xMn_xSe
• 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：1981-1982
• 文件大小：68.5 K

摘要

From magnetization measurements at T=20mK on two bulk samples of Cd_1−xMn_xSe (x=0.59% and x=1.15%), four distant-neighbors antiferromagnetic exchange constants have been measured. The results, in order of decreasing strength, after the two J's for nearest-neighbors pairs, are −0.35±0.01K, −0.20±0.01K, −0.10±0.01K, and −0.08±0.01K. These results confirm the long-range character of the distant-neighbor exchange interactions in the Mn-based II–VI diluted magnetic semiconductors.