Patterned growth of crystalline Y3Fe5O12 nanostructures with engineered magnetic shape anisotropy

被引：41

作者：

Zhu, Na ^{[1
]}

Chang, Houchen ^{[2
]}

Franson, Andrew ^{[3
]}

Liu, Tao ^{[2
]}

Zhang, Xufeng ^{[1
]}

Johnston-Halperin, E. ^{[3
]}

Wu, Mingzhong ^{[2
]}

Tang, Hong X. ^{[1
]}

机构：

[1] Yale Univ, Dept Elect Engn, New Haven, CT 06511 USA

[2] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA

[3] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 25期

基金：

美国国家科学基金会;

关键词：

FERROMAGNETIC-RESONANCE; DATA-STORAGE; FILMS; ARRAYS; ELEMENTS; MEMORY;

D O I：

10.1063/1.4986474

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate patterned growth of epitaxial yttrium iron garnet (YIG) thin films using lithographically defined templates on gadolinium gallium garnet substrates. The fabricated YIG nanostructures yield the desired crystallographic orientation, excellent surface morphology, and narrow ferromagnetic resonance (FMR) linewidth (similar to 4 Oe). Shape-induced magnetic anisotropy is clearly observed in a patterned array of nanobars engineered to exhibit the larger coercivity (40 Oe) compared with that of continuous films. Both hysteresis loop and angle-dependent FMR spectra measurements indicate that the easy axis aligns along the longitudinal direction of the nanobars, with an effective anisotropy field of 195 Oe. Our work overcomes difficulties in patterning YIG thin films and provides an effective means to control their magnetic properties and magnetic bias conditions. Published by AIP Publishing.

引用

页数：5

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