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Control of Domain Structure in Artificial Ni Wires Fabricated on an LiNbO3 Substrate

机译:LiNbO 3 衬底上人工镍丝的畴结构控制

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摘要

We demonstrated control of magnetic domain structure formation within micro-scale polycrystalline Ni wires fabricated on a single crystalline LiNbO3 substrate. We observed the domain structures using X-ray magnetic circular dichroism-photoemission electron microscopy at SPring-8 BL25SU and BL17SU. Both zebra-stripe domain and ordinary single domain structures can be formed in the Ni wire in control of alignment of the wire onto the substrate. The result suggests that magnetoelastic effects from pizoelectristic substrates can strongly influence the magnetization alignment, overwhelming their shape magnetic anisotropy. The formation of zebra-stripe domain structure can be qualitatively explained by the micromagnetic simulation under the assumption of the magnetic anisotropy perpendicular to the longitudinal axis of wire. Our finding provides a way to control the domain structure and magnetization reversal using the combination of shape magnetic anisotropy and strain-induced anisotropy.
机译:我们展示了在单晶LiNbO3衬底上制造的微型多晶镍丝内磁畴结构形成的控制。我们在SPring-8 BL25SU和BL17SU上使用X射线磁性圆二色性-光发射电子显微镜观察了畴结构。可以在镍丝中形成斑马条纹状区域和普通的单畴结构,以控制金属丝在基板上的对准。结果表明,来自压电基板的磁弹性效应可以强烈影响磁化方向,从而使其形状磁各向异性不堪重负。在垂直于导线纵轴的磁各向异性的假设下,可以通过微磁模拟定性地解释斑马条纹结构的形成。我们的发现提供了一种使用形状磁各向异性和应变感应各向异性的组合来控制畴结构和磁化反转的方法。

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