中国物理B ›› 2019, Vol. 28 ›› Issue (2): 27502-027502.doi: 10.1088/1674-1056/28/2/027502

所属专题: Virtual Special Topic — Magnetism and Magnetic Materials

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

Unusual tunability of multiferroicity in GdMn2O5 by electric field poling far above multiferroic ordering point

Xiang Li(李翔), Shuhan Zheng(郑书翰), Liman Tian(田礼漫), Rui Shi(石锐), Meifeng Liu(刘美风), Yunlong Xie(谢云龙), Lun Yang(杨伦), Nian Zhao(赵念), Lin Lin(林林), Zhibo Yan(颜志波), Xiuzhang Wang(王秀章), Junming Liu(刘俊明)   

  1. 1 Institute for Advanced Materials, Hubei Normal University, Huangshi 435002, China;
    2 Laboratory of Solid State Microstructures and Innovative Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
    3 Institute for Advanced Materials, South China Normal University, Guangzhou 510006, China
  • 收稿日期:2018-09-06 修回日期:2018-11-28 出版日期:2019-02-05 发布日期:2019-02-05
  • 通讯作者: Xiang Li E-mail:lixplus@126.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11804088, 11234005, 11374147, 51431006, and 11704109), the National Key Research Program of China (Grant No. 2016YFA0300101), and the Research Project of Hubei Provincial Department of Education, China (Grant No. B2018146).

Unusual tunability of multiferroicity in GdMn2O5 by electric field poling far above multiferroic ordering point

Xiang Li(李翔)1,2, Shuhan Zheng(郑书翰)2, Liman Tian(田礼漫)1, Rui Shi(石锐)1, Meifeng Liu(刘美风)1, Yunlong Xie(谢云龙)1, Lun Yang(杨伦)1, Nian Zhao(赵念)1, Lin Lin(林林)2, Zhibo Yan(颜志波)2, Xiuzhang Wang(王秀章)1, Junming Liu(刘俊明)1,2,3   

  1. 1 Institute for Advanced Materials, Hubei Normal University, Huangshi 435002, China;
    2 Laboratory of Solid State Microstructures and Innovative Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
    3 Institute for Advanced Materials, South China Normal University, Guangzhou 510006, China
  • Received:2018-09-06 Revised:2018-11-28 Online:2019-02-05 Published:2019-02-05
  • Contact: Xiang Li E-mail:lixplus@126.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11804088, 11234005, 11374147, 51431006, and 11704109), the National Key Research Program of China (Grant No. 2016YFA0300101), and the Research Project of Hubei Provincial Department of Education, China (Grant No. B2018146).

摘要:

The multiferroicity in the RMn2O5 family remains unclear, and less attention has been paid to its dependence on high-temperature (high-T) polarized configuration. Moreover, no consensus on the high-T space group symmetry has been reached so far. In view of this consideration, one may argue that the multiferroicity of RMn2O5 in the low-T range depends on the poling sequence starting far above the multiferroic ordering temperature. In this work, we investigate in detail the variation of magnetically induced electric polarization in GdMn2O5 and its dependence on electric field poling routine in the high-T range. It is revealed that the multiferroicity does exhibit qualitatively different behaviors if the high-T poling routine changes, indicating the close correlation with the possible high-T polarized state. These emergent phenomena may be qualitatively explained by the co-existence of two low-T polarization components, a scenario that was proposed earlier. One is the component associated with the Mn3+-Mn4+-Mn3+ exchange striction that seems to be tightly clamped by the high-T polarized state, and the other is the component associated with the Gd3+-Mn4+-Gd3+ exchange striction that is free of the clamping. The present findings may offer a different scheme for the electric control of the multiferroicity in RMn2O5.

关键词: multiferroicity, GdMn2O5, high-T polarized state, exchange striction

Abstract:

The multiferroicity in the RMn2O5 family remains unclear, and less attention has been paid to its dependence on high-temperature (high-T) polarized configuration. Moreover, no consensus on the high-T space group symmetry has been reached so far. In view of this consideration, one may argue that the multiferroicity of RMn2O5 in the low-T range depends on the poling sequence starting far above the multiferroic ordering temperature. In this work, we investigate in detail the variation of magnetically induced electric polarization in GdMn2O5 and its dependence on electric field poling routine in the high-T range. It is revealed that the multiferroicity does exhibit qualitatively different behaviors if the high-T poling routine changes, indicating the close correlation with the possible high-T polarized state. These emergent phenomena may be qualitatively explained by the co-existence of two low-T polarization components, a scenario that was proposed earlier. One is the component associated with the Mn3+-Mn4+-Mn3+ exchange striction that seems to be tightly clamped by the high-T polarized state, and the other is the component associated with the Gd3+-Mn4+-Gd3+ exchange striction that is free of the clamping. The present findings may offer a different scheme for the electric control of the multiferroicity in RMn2O5.

Key words: multiferroicity, GdMn2O5, high-T polarized state, exchange striction

中图分类号:  (Magnetoelectric effects, multiferroics)

  • 75.85.+t
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 77.80.-e (Ferroelectricity and antiferroelectricity)