CURVATURE-INDUCED MAGNETOCHIRALITY
CURVATURE-INDUCED MAGNETOCHIRALITY
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DOI：
10.1142/s2010324713400092
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发表时间：
2013-09-01
期刊：
影响因子：
1.8
通讯作者：
Hertel, Riccardo
中科院分区：
文献类型：
--
作者：
Hertel, Riccardo
弯曲的几何形状，如纳米管和柔性膜一般不同于平面膜的内部应变，测地线路径的传输现象，并打破了局部反演对称。在铁磁性中，这些特性可以导致令人惊讶的效果，特别是当曲率半径达到固有长度尺度时，如畴壁宽度或磁振子波长。模拟研究表明，弯曲的铁磁薄膜表现出类似于Dzyaloshinskiii-Moriya相互作用的磁手征性质。与新兴的挠曲电领域密切类似，铁磁膜的受控弯曲提供了一种新的、可逆的和通用的方法来操纵它们的磁性。
Curved geometries like nanotubes and flexible membranes generally differ from flat films by internal strain, geodesic pathways for transport phenomena, and a break of the local inversion symmetry. In ferromagnetism, these characteristics can lead to surprising effects, especially when the curvature radius reaches intrinsic length scales, like the domain wall width or the magnon wave length. Simulation studies demonstrate that curved ferromagnetic thin films display magnetochiral properties similar to the Dzyaloshinskii-Moriya interaction (DMI). In close analogy to the emerging field of flexoelectricity, it is suggested that the controlled bending of ferromagnetic membranes provides a new, reversible and universal method to manipulate their magnetic properties.