Spin-glass state induced low field magnetization-step effect in a Hg_1−xMn_xTe single crystal

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• 作者：Liangqing Zhu ; Jun Shao ; Liang Zhu ; Xiren Chen ; Tie Lin ; Yuanyuan Zhang ; Yanqiu Li ; Zhen Qi ; Wei Bai ; Xiaodong Tang and Junhao Chu
• 刊名：physica status solidi (b)
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：253
• 期：10
• 页码：2015-2019
• 全文大小：438K
• ISSN：1521-3951

文摘

The low field magnetization-step effect was observed in the spin-glass (SG) regime of p-type line-library/content/render" xmlns="http://www.w3.org/1998/Math/MathML">Hg0.8line-library/content/render" xmlns="http://www.w3.org/1998/Math/MathML">Mn0.2line-library/content/render" xmlns="http://www.w3.org/1998/Math/MathML" mathvariant="normal">Te single crystal when the temperature was less than about 3 K. The main features of this effect were (i) the magnetic susceptibility suddenly reduced to almost zero as the magnetic field decreased below a critical value; (ii) the critical magnetic field correlated reversely to temperature. In addition, X-ray diffraction, Raman scattering, and temperature-dependent Hall measurements manifested this effect was the intrinsic nature of the line-library/content/render" xmlns="http://www.w3.org/1998/Math/MathML">Hg1−xline-library/content/render" xmlns="http://www.w3.org/1998/Math/MathML">Mnxline-library/content/render" xmlns="http://www.w3.org/1998/Math/MathML" mathvariant="normal">Te single crystal. Qualitative theoretical analysis suggests that the possible mechanism of low field magnetization-step effect is the combined effect of SG transition and (long-range) antiferromagnetic interactions among line-library/content/render" xmlns="http://www.w3.org/1998/Math/MathML">Mn2+ ions in randomly frustrated spins system.