Dependence of improper ferroelectricity on the preferred orientation of Mn3 spins in CaMn7O12
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- 作者：Jian-Qing Dai djqkust@sina.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：Magnetic multiferroics ; CaMn7O12 ; First-principles
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2017
- 出版时间：15 February 2017
- 年：2017
- 卷：424
- 期：Complete
- 页码：314-322
- 全文大小：1103 K
文摘
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Mn3 spin is critical for both magnitude and direction of electric polarization.
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Polarization reversal can be achieved by changing orientation angle of Mn3 spins.
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Mismatch of BECs with lattice symmetry causes abnormal IR-activity of Raman modes.