(Ba_1−xK_x)(Cu_2−xMn_x)Se₂: A copper-based bulk form diluted magnetic semiconductor with orthorhombic BaCu₂S₂-type structure

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• 作者：Shengli Guo^a ; ^b ; Huiyuan Man^a ; ^b ; Xin Gong^a ; ^b ; Cui Ding^a ; ^b ; Yao Zhao^a ; ^b ; Bin Chen^c ; Yang Guo^c ; Hangdong Wang^c ; F.L. Ning^a ; ^b ; ^{ningfl@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：BaCu2Se2 ; Diluted magnetic semiconductor ; Curie temperature ; Ferromagnetic ordering
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2016
• 出版时间：15 February 2016
• 年：2016
• 卷：400
• 期：Complete
• 页码：295-299
• 全文大小：1582 K

文摘

A new copper-based bulk form diluted magnetic semiconductor (DMS) (Ba_1−xK_x)(Cu_2−xMn_x)Se₂ (x=0.075, 0.10, 0.125, and 0.15) with T_C ∼18 K has been synthesized. K substitution for Ba introduces hole-type carriers, while Mn substitution for Cu provides local spins. Different from previous reported DMSs, this material crystallizes into orthorhombic BaCu₂S₂-type crystal structure. No ferromagnetism is observed when only doping Mn, and clear ferromagnetic transition and hysteresis loop have been observed as K and Mn are codoped into the parent compound BaCu₂Se₂.