磁致多铁性物理与新材料设计-东南大学.PDF

磁致多铁性物理与新材料设计* 2013 －11 －15收到 † email ：sdong@ † †† 1， 2 ， 董 帅 向红军 †† email ：hxiang@ (1 东南大学物理系 南京 211189) DOI：10.7693/w (2 复旦大学物理系 计算物质科学教育部重点实验室 应用表面物理国家重点实验室 上海 200433) Physics and design of magnetic multiferroics † †† DONG Shuai 1， XIANG Hong-Jun2 ， (1 Department of Physics ，Southeast University ，Nanjing 211189 ，China) (2 Department of Physics and Key Laboratory of Computational Physical Sciences (Ministry of Education) ，State Key Laboratory of Surface Physics ，Fudan University ，Shanghai 200433 ，China) 摘 要 磁致多铁材料是多铁性材料大家族中的后起之秀，其特色在于其铁电性起 源于特定的磁序，因此其铁电性与磁性紧密关联，具有本征的强磁电耦合效应。目前对磁致 多铁性的研究以基础物理为主。随着对磁致多铁现象背后物理机制认识的不断深入，不断有 新的磁致多铁材料被设计、预言和发现，其性能也在不断地提高。文章简要介绍了磁致多铁 材料所涉及的基本物理机制，并根据这些已知的规律，回顾了近年来寻找和设计新的磁致多 铁材料的经验。 关键词 磁致多铁，Dzyaloshinskii—Moriya作用，交换收缩， 磁序诱导铁电性统一极化模型，第一性原理计算 Abstract Magnetic multiferroics belong to an important branch of the big multiferroics family. Because the ferroelectric polarizations are directly induced by particular magnetic orders, magnetic multiferroics exhibit strong intrinsic magnetoelectric coupling. Current research on mag- netic multiferroics is mostly focused on their fundamental physics. Benefitting from the progress of research on physical mechanisms, more and more new magnetic multiferroic materials have been designed, predicted, and discovered, with continual improvement in their magnetoelectric per- formance. We review briefly the physical mechanisms involved in magnet