Spin-reorientation magnetic transitions in Mn-doped SmFeO(3).
Spin-reorientation magnetic transitions in Mn-doped SmFeO(3).
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Mn 掺杂 SmFeO3 中的自旋重定向磁转变
DOI：
10.1107/s205225251700793x
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发表时间：
2017-09-01
期刊：
影响因子：
3.9
通讯作者：
Ren W
中科院分区：
文献类型：
--
作者：
Kang J;Yang Y;Qian X;Xu K;Cui X;Fang Y;Chandragiri V;Kang B;Chen B;Stroppa A;Cao S;Zhang J;Ren W
研究了掺锰SmFeO_3的自旋重取向磁相变。自旋重新取向是一种磁相变，其中磁化强度矢量在温度或磁场发生变化时相对于晶轴旋转。例如，SmFeO_3表现出从480 K以上的c轴到450 K以下的a轴的磁化旋转，称为Γ4→Γ2转变。本文报道了新型单晶钙钛矿SmFe0.75Mn0.25O_3的成功合成，并在室温上下发现了有趣的自旋重新取向。除了在Tsr2=382 K附近观察到Γ4→Γ2磁性相变的自旋重取向外，由于Mn掺杂，在Tsr1=2 12 K附近还观察到了新的自旋重取向Γ2→Γ1，这在母体稀土钙钛矿化合物中没有观察到。这种意想不到的自旋构型具有完全的反铁磁序，没有任何倾斜引起的弱铁磁矩，导致在低温区域零磁化。用M-T和M-H测量研究了观察到的自旋再取向转变的温度和磁场依赖关系。
Spin-reorientation magnetic transitions are studied in Mn-doped SmFeO3. Spin reorientation is a magnetic phase transition in which rotation of the magnetization vector with respect to the crystallographic axes occurs upon a change in the temperature or magnetic field. For example, SmFeO3 shows a magnetization rotation from the c axis above 480 K to the a axis below 450 K, known as the Γ4 → Γ2 transition. This work reports the successful synthesis of the new single-crystal perovskite SmFe0.75Mn0.25O3 and finds interesting spin reorientations above and below room temperature. In addition to the spin reorientation of the Γ4 → Γ2 magnetic phase transition observed at around T SR2 = 382 K, a new spin reorientation, Γ2 → Γ1, was seen at around T SR1 = 212 K due to Mn doping, which could not be observed in the parent rare earth perovskite compound. This unexpected spin configuration has complete antiferromagnetic order without any canting-induced weak ferromagnetic moment, resulting in zero magnetization in the low-temperature regime. M–T and M–H measurements have been made to study the temperature and magnetic-field dependence of the observed spin reorientation transitions.