Domains and domain walls in multiferroics
Domains and domain walls in multiferroics
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多铁学中的畴和畴壁
DOI：
10.1515/psr-2019-0067
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发表时间：
2020-09-01
影响因子：
--
通讯作者：
Bibes, Manuel
中科院分区：
文献类型：
--
作者：
Evans, Donald M.;Garcia, Vincent;Bibes, Manuel
多铁性材料是结合了几种铁性序的材料，如铁电性、铁磁性（或反铁磁性）、铁弹性和铁环性。从基本的角度来看，它们是令人感兴趣的，因为它们具有多个（耦合的）非线性功能响应，提供了无数的相关现象，并且因为有机会将这些功能应用于新的设备应用。例如，一种应用是在非易失性存储器中，这导致了对铁电和磁性多铁性的特别关注。其愿景是将铁电信息的低写入功率与磁性信息的容易、非易失性阅读相结合，以提供“两全其美”的计算机存储器。为了实现这一点，两个铁电序需要通过磁电效应紧密联系在一起。磁电耦合-极化和磁化相互作用的方式-表现为畴和畴壁的形成和相互作用，因此要理解如何设计未来的器件，必须首先理解畴和畴壁的相互作用。在这篇文章中，我们提供了一个简短的介绍铁电体和铁磁体的畴的形成，以及不同的显微镜技术，使这种域的可视化。然后，我们回顾了最近的研究多铁性畴和畴壁，包括他们的操纵和有趣的性质，如增强的导电性和异常磁序。最后，我们讨论了未来的前景，有关领域的多铁性畴壁和新兴的拓扑结构，如铁电涡旋和skyrmions。
Multiferroics are materials combining several ferroic orders, such as ferroelectricity, ferro- (or antiferro-) magnetism, ferroelasticity and ferrotoroidicity. They are of interest both from a fundamental perspective, as they have multiple (coupled) non-linear functional responses providing a veritable myriad of correlated phenomena, and because of the opportunity to apply these functionalities for new device applications. One application is, for instance, in non-volatile memory, which has led to special attention being devoted to ferroelectric and magnetic multiferroics. The vision is to combine the low writing power of ferroelectric information with the easy, non-volatile reading of magnetic information to give a "best of both worlds" computer memory. For this to be realised, the two ferroic orders need to be intimately linked via the magnetoelectric effect. The magnetoelectric coupling - the way polarization and magnetization interact - is manifested by the formation and interactions of domains and domain walls, and so to understand how to engineer future devices one must first understand the interactions of domains and domain walls. In this article, we provide a short introduction to the domain formation in ferroelectrics and ferromagnets, as well as different microscopy techniques that enable the visualization of such domains. We then review the recent research on multiferroic domains and domain walls, including their manipulation and intriguing properties, such as enhanced conductivity and anomalous magnetic order. Finally, we discuss future perspectives concerning the field of multiferroic domain walls and emergent topological structures such as ferroelectric vortices and skyrmions.