Abstract We report magnetic domain formation control within micro-scale polycrystalline Ni wires on a single-crystal Y-cut 128° LiNbO3 substrate. X-ray magnetic circular dichroism photoemission electron microscopy (XCDM-PEEM), micromagnetic simulations, and magnetoresistance (MR) measurements allowed us to estimate the uniaxial magnetic anisotropy induced by the magnetoelastic effect that originated at the interface between each Ni layer and the LiNbO3 substrate. Comparison of the XMCD-PEEM and MR measurement results shows that the competition between the shape magnetic anisotropy and the uniaxial magnetic anisotropy parallel to the orientation flat (OF) direction of the substrate leads to variations in both the magnetization order and the magnetization reversal process. The uniaxial magnetic anisotropy is estimated to be approximately 3.3 kJ/m3. This heterojunction structure composed of ferromagnetic and ferroelectric layers thus offers alternative ways to produce artificial functional multiferroic materials and devices.

中文翻译：

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LiNbO 3 衬底上Ni线的异质结诱导磁各向异性和磁化反转

摘要 我们报告了在单晶 Y 切割 128° LiNbO3 衬底上的微型多晶 Ni 线内的磁畴形成控制。X 射线磁性圆二色性光电电子显微镜 (XCDM-PEEM)、微磁模拟和磁阻 (MR) 测量使我们能够估计由每个 Ni 层和 LiNbO3 基板之间的界面处产生的磁弹性效应引起的单轴磁各向异性. XMCD-PEEM和MR测量结果的比较表明，形状磁各向异性和平行于衬底取向平面（OF）方向的单轴磁各向异性之间的竞争导致磁化顺序和磁化反转过程的变化。单轴磁各向异性估计约为 3.3 kJ/m3。