Giant Ferroelectric Polarization of CaMn7O12 Induced by a Combined Effect of Dzyaloshinskii-Moriya Interaction and Exchange Striction

被引：109
|
作者：
Lu, X. Z. [1 ,2 ]
Whangbo, M. -H. [3 ]
Dong, Shuai [4 ]
Gong, X. G. [1 ,2 ]
Xiang, H. J. [1 ,2 ]
机构：
[1] Fudan Univ, Key Lab Computat Phys Sci, Minist Educ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China
[2] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
[3] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
[4] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 18期
关键词：
ANISOTROPIC SUPEREXCHANGE INTERACTION; MULTIFERROICS;
D O I：
10.1103/PhysRevLett.108.187204
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
By extending our general spin-current model to noncentrosymmetric spin dimers and performing density functional calculations, we investigate the causes for the helical magnetic order and the origin of the giant ferroelectric polarization of CaMn7O12. The giant ferroelectric polarization is proposed to be caused by the symmetric exchange striction due to the canting of the Mn4+ spin arising from its strong Dzyaloshinskii-Moriya interaction. Our study suggests that CaMn7O12 may exhibit a novel magnetoelectric coupling mechanism in which the magnitude of the polarization is governed by the exchange striction, but the direction of the polarization by the chirality of the helical magnetic order.
引用
收藏
页数：5
相关论文
共 33 条
  • [1] Origin of giant improper ferroelectric polarization in CaMn7O12: A first principles perspective
    Sharma, Vinit
    Bealing, Clive R.
    Pilania, G.
    Ramprasad, R.
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2013, 246
  • [2] Magnetic properties and origins of ferroelectric polarization in multiferroic CaMn7O12
    Zhang, J. T.
    Lu, X. M.
    Zhou, J.
    Sun, H.
    Huang, F. Z.
    Zhu, J. S.
    PHYSICAL REVIEW B, 2013, 87 (07)
  • [3] Magnetically induced polarization in charge-ordered CaMn7O12
    Lim, Jin Soo
    Saldana-Greco, Diomedes
    Rappe, Andrew
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2015, 250
  • [4] Twist of rhombohedra, spin helix, and “giant” polarization in a CaMn7O12 multiferroic crystal
    S. A. Pikin
    Physics of the Solid State, 2016, 58 : 540 - 544
  • [5] Twist of rhombohedra, spin helix, and "giant" polarization in a CaMn7O12 multiferroic crystal
    Pikin, S. A.
    PHYSICS OF THE SOLID STATE, 2016, 58 (03) : 540 - 544
  • [6] Giant Improper Ferroelectricity in the Ferroaxial Magnet CaMn7O12
    Johnson, R. D.
    Chapon, L. C.
    Khalyavin, D. D.
    Manuel, P.
    Radaelli, P. G.
    Martin, C.
    ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 2012, 68 : S95 - S95
  • [7] Exchange Bias Driven by the Dzyaloshinskii-Moriya Interaction and Ferroelectric Polarization at G-Type Antiferromagnetic Perovskite Interfaces
    Dong, Shuai
    Yamauchi, Kunihiko
    Yunoki, Seiji
    Yu, Rong
    Liang, Shuhua
    Moreo, Adriana
    Liu, J. -M.
    Picozzi, Silvia
    Dagotto, Elbio
    PHYSICAL REVIEW LETTERS, 2009, 103 (12)
  • [8] Giant Improper Ferroelectricity in the Ferroaxial Magnet CaMn7O12
    Johnson, R. D.
    Chapon, L. C.
    Khalyavin, D. D.
    Manuel, P.
    Radaelli, P. G.
    Martin, C.
    PHYSICAL REVIEW LETTERS, 2012, 108 (06)
  • [9] Ferroelectric phase transition and spontaneous electric polarization in CaMn7O12 from first principles
    Dai, Jian-Qing
    Song, Yu-Min
    Zhang, Hu
    NEW JOURNAL OF PHYSICS, 2015, 17
  • [10] Exchange Bias in Multiferroic Ca3Mn2O7 Effected by Dzyaloshinskii-Moriya Interaction
    Sahlot, Pooja
    Jana, Anupam
    Awasthi, A. M.
    62ND DAE SOLID STATE PHYSICS SYMPOSIUM, 2018, 1942
1234