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Multiferroic phase transitions in manganites RMnO_3：A two-orbital double exchange simulation
  • ISSN号：1674-1056
  • 期刊名称：《中国物理B：英文版》
  • 时间：0
  • 分类：O482.5[理学—固体物理;理学—物理] TH134[机械工程—机械制造及自动化]
  • 作者机构：[1]Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China, [2]Jiangsu Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu 215500, China
  • 相关基金：Project supported by the National Natural Science Foundation of China （Grant Nos. 51031004,11004027,and 11074113）; the National Basic Research Program of China （Grant Nos. 2011CB922101 and 2009CB929501）; the Priority Academic Program Development of Jiangsu Provincial Higher Education Institutions,China
作者： 陶永梅[1,2], 林林[1], 董帅[1], 刘俊明[1]
关键词： 反铁磁, 双轨道, 相变, 双交换, 模拟, 蒙特卡罗算法, 稀土离子, 铁磁相, multiferroic phase, R-site doping, two-orbital exchange model
中文摘要：

The semi-quantum two-orbital exchange model is used to investigate the effect of small rare-earth ion substitution on orthorhombic RMnO 3 with A-type antiferromagnetic order,using the Monte Carlo algorithm,exact diagonalization,and zero-temperature optimization approaches.It is revealed that the substitution results in a rich multiferroic phase diagram where the coexisting A-type antiferromagnetic phase and spiral spin phase,pure spiral spin phase,coexisting spiral spin phase,the E-type antiferromagnetic phase,and the pure E-type antiferromagnetic phase emerge in sequence.The multiferroic phase transitions modulate substantially the electric polarization,which is consistent qualitatively with recent experiments.

英文摘要：

The semi-quantum two-orbital exchange model is used to investigate the effect of small rare-earth ion substitution on orthorhombic RMnO 3 with A-type antiferromagnetic order,using the Monte Carlo algorithm,exact diagonalization,and zero-temperature optimization approaches.It is revealed that the substitution results in a rich multiferroic phase diagram where the coexisting A-type antiferromagnetic phase and spiral spin phase,pure spiral spin phase,coexisting spiral spin phase,the E-type antiferromagnetic phase,and the pure E-type antiferromagnetic phase emerge in sequence.The multiferroic phase transitions modulate substantially the electric polarization,which is consistent qualitatively with recent experiments.

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期刊信息
  • 《中国物理B：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会和中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京 中关村 中国科学院物理研究所内
  • 邮编：100080
  • 邮箱：
  • 电话：010-82649026 82649519
  • 国际标准刊号：ISSN：1674-1056
  • 国内统一刊号：ISSN：11-5639/O4
  • 邮发代号:
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  • 被引量:406