Competition between ferromagnetic and antiferromagnetic interactions by Cr doping at Mn sites in antiperovskite Mn_{3∿span style='font-style: italic'>x}Cr_xZnN (0≿span style='font-style: italic'>x≿.5) compounds

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• 作者：Muhammad Imran Malik ; Ying Sun ; Lei Wang ; Sihao Deng ; Kewen Shi ; Pengwei Hu ; Huiqing Lu ; Cong Wang ; ^{congwang@buaa.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Antiperovskite ; Magnetic phase transition ; Weiss Temperature ; Mn3&minus ; xCrxZnN
• 刊名：Physica B: Physics of Condensed Matter
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：488
• 期：Complete
• 页码：19-23
• 全文大小：1581 K

文摘

The Cr doping effect on the lattice and magnetic properties in Mn_3−xCr_xZnN was reported in the antiferromagnetic intermetallic host material Mn₃ZnN. The lattice parameter decreases with the increase of the Cr concentration. Measurements of magnetization from 10 K to 350 K reveal that sharp antiferromagnetic (AFM)-to-paramagnetic (PM) transitions of the host material exist at 185 K (ZFC) and 177 K (FC). The peak is broadened clearly as the Cr doping was increased and when the Cr concentration exceeded 0.3, a significant ferromagnetic (FM) character was found to coexist with an AFM phase. At x=0.4 and 0.5, the M–H curves exhibit small magnetic hysteresis loop, indicating the dominant FM interactions in these samples. Also, a positive value of Weiss Temperature (Θ_W) at x=0.5 in H/M–T plot suggests that the FM interaction is dominant when the Cr doping increases.