Influences of P doping on magnetic phase transition and structure in MnCoSi ribbon

doi:10.1088/1674-1056/24/6/067502

中国物理B ›› 2015, Vol. 24 ›› Issue (6): 67502-067502.doi: 10.1088/1674-1056/24/6/067502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Influences of P doping on magnetic phase transition and structure in MnCoSi ribbon

杜乾衡^a, 陈国富^a, 杨文云^a, 华慕欣^a, 杜红林^a, 王常生^a, 刘顺荃^a, 韩景智^a, 周栋^b, 张焱^a, 杨金波^a

a School of Physics, Peking University, Beijing 100871, China;
b Central Iron and Steel Research Institute, Beijing 100081, China

收稿日期:2014-12-15 修回日期:2015-01-20 出版日期:2015-06-05 发布日期:2015-06-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11275013), the Fund from the National Physics Laboratory, China Academy of Engineering Physics (Grant No. 2013DB01), and the National Key Basic Research Program of China (Grant No. 2010CB833104).

Influences of P doping on magnetic phase transition and structure in MnCoSi ribbon

Du Qian-Heng (杜乾衡)^a, Chen Guo-Fu (陈国富)^a, Yang Wen-Yun (杨文云)^a, Hua Mu-Xin (华慕欣)^a, Du Hong-Lin (杜红林)^a, Wang Chang-Sheng (王常生)^a, Liu Shun-Quan (刘顺荃)^a, Han Jing-Zhi (韩景智)^a, Zhou Dong (周栋)^b, Zhang Yan (张焱)^a, Yang Jin-Bo (杨金波)^a

a School of Physics, Peking University, Beijing 100871, China;
b Central Iron and Steel Research Institute, Beijing 100081, China

Received:2014-12-15 Revised:2015-01-20 Online:2015-06-05 Published:2015-06-05
Contact: Du Hong-Lin E-mail:duhonglin@pku.edu.cn
About author:75.30.Kz; 75.30.Sg
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11275013), the Fund from the National Physics Laboratory, China Academy of Engineering Physics (Grant No. 2013DB01), and the National Key Basic Research Program of China (Grant No. 2010CB833104).

摘要/Abstract

摘要： The structure and magnetic properties of MnCoSi_1-xP_x (x=0.05–0.50) are systematically investigated. With P content increasing, the lattice parameter a increases monotonically while both b and c decrease. At the same time, the temperature of metamagnetic transition from a low-temperature non-collinear ferromagnetic state to a high-temperature ferromagnetic state decreases and a new magnetic transition from a higher-magnetization ferromagnetic state to a lower-magnetization ferromagnetic state is observed in each of these compounds for the first time. This is explained by the changes of crystal structure and distance between Mn and Si atoms with the increase of temperature according to the high-temperature XRD result. The metamagnetic transition is found to be a second-order magnetic transition accompanied by a low inversed magnetocaloric effect (1.0 J·kg^-1·K^-1 at 5 T) with a large temperature span (190 K at 5 T) compared with the scenario of MnCoSi. The changes in the order of metamagnetic transition and structure make P-doped MoCoSi compounds good candidates for the study of magnetoelastic coupling and the modulation of magnetic phase transition.

关键词: metamagnetic transition, magnetoelastic coupling, magnetocaloric effect

Abstract: The structure and magnetic properties of MnCoSi_1-xP_x (x=0.05–0.50) are systematically investigated. With P content increasing, the lattice parameter a increases monotonically while both b and c decrease. At the same time, the temperature of metamagnetic transition from a low-temperature non-collinear ferromagnetic state to a high-temperature ferromagnetic state decreases and a new magnetic transition from a higher-magnetization ferromagnetic state to a lower-magnetization ferromagnetic state is observed in each of these compounds for the first time. This is explained by the changes of crystal structure and distance between Mn and Si atoms with the increase of temperature according to the high-temperature XRD result. The metamagnetic transition is found to be a second-order magnetic transition accompanied by a low inversed magnetocaloric effect (1.0 J·kg^-1·K^-1 at 5 T) with a large temperature span (190 K at 5 T) compared with the scenario of MnCoSi. The changes in the order of metamagnetic transition and structure make P-doped MoCoSi compounds good candidates for the study of magnetoelastic coupling and the modulation of magnetic phase transition.

Key words: metamagnetic transition, magnetoelastic coupling, magnetocaloric effect

中图分类号: (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

75.30.Kz

75.30.Sg (Magnetocaloric effect, magnetic cooling)

杜乾衡, 陈国富, 杨文云, 华慕欣, 杜红林, 王常生, 刘顺荃, 韩景智, 周栋, 张焱, 杨金波. Influences of P doping on magnetic phase transition and structure in MnCoSi ribbon[J]. 中国物理B, 2015, 24(6): 67502-067502.

Du Qian-Heng (杜乾衡), Chen Guo-Fu (陈国富), Yang Wen-Yun (杨文云), Hua Mu-Xin (华慕欣), Du Hong-Lin (杜红林), Wang Chang-Sheng (王常生), Liu Shun-Quan (刘顺荃), Han Jing-Zhi (韩景智), Zhou Dong (周栋), Zhang Yan (张焱), Yang Jin-Bo (杨金波). Influences of P doping on magnetic phase transition and structure in MnCoSi ribbon[J]. Chin. Phys. B, 2015, 24(6): 67502-067502.

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Influences of P doping on magnetic phase transition and structure in MnCoSi ribbon

Influences of P doping on magnetic phase transition and structure in MnCoSi ribbon

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