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arXiv 1107.4848cond-mat.mes-hallcond-mat.mtrl-sci
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有限尺寸多铁性材料的应力-磁场Phase Diagram理论:铁磁畴与反铁磁畴的竞争

On the Theory of Stress-Magnetic Field Phase Diagram of the Finite Size Multiferroics: Competition between Ferro- and Antiferromagnetic Domains

H. V. Gomonay, I. G. Korniienko, V. M. Loktev

摘要:

多重铁性材料是同时表现出两种有序性的系统,其宏观性质可以通过不同性质的外场来控制。我们分析了具有反铁(AFM)和铁磁(FM)有序的多铁性材料在外磁场和应力场作用下的行为。这两种场的组合使得有可能实现具有不同畴结构的宏观态。以这种方式获得的双畴状态显示出宏观应变与磁场的线性关系,这对于AFM是不寻常的。施加到样品的小但非零的应力也可以导致磁化相对于磁场依赖性的偏置。

英文摘要:

Macroscopic properties of multiferroics, the systems that show simultaneously two types of ordering, could be controlled by the external fields of different nature. We analyze the behavior of multiferroics with antiferro-(AFM) and ferromagnetic (FM) ordering under the action of external magnetic and stress fields. A combination of these two fields makes it possible to achieve macroscopic states with different domain structures. The two-domain state obtained in this way shows a linear dependence of macroscopic strain vs magnetic field which is unusual for AFMs. A small but nonzero stress applied to the sample can also result in the bias of the magnetization vs magnetic field dependence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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