Substrate‐Dependent Anisotropy and Damping in Epitaxial Bismuth Yttrium Iron Garnet Thin Films
Substrate‐Dependent Anisotropy and Damping in Epitaxial Bismuth Yttrium Iron Garnet Thin Films
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DOI：
10.1002/admi.202300217
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发表时间：
2023-08
影响因子：
5.4
通讯作者：
Takian Fakhrul;Bharat Khurana;H. Nembach;J. Shaw;Yabin Fan;G. Riley;Luqiao Liu;C. Ross
中科院分区：
文献类型：
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作者：
Takian Fakhrul;Bharat Khurana;H. Nembach;J. Shaw;Yabin Fan;G. Riley;Luqiao Liu;C. Ross
结合联合收割机强大的垂直磁各向异性（PMA）与低吉尔伯特阻尼的铁石榴石是理想的磁化动力学的研究以及自旋电子器件的发展。本文报道了在一系列单晶镓石榴石衬底上生长的低阻尼铋取代铁石榴石薄膜（Bi0.8Y2.2Fe5O12）的磁性。各向异性由磁弹性和生长诱导贡献主导。在PMA膜的场循环过程中形成条纹和三角形畴，在具有较高PMA的膜中三角形畴明显。铁磁共振测量显示阻尼低至1.3 × 10−4，线宽为2.7至5.0 mT。BiYIG/Pt双层膜的自旋混合电导的下限与其他铁石榴石/Pt双层膜的自旋混合电导的下限相似。
Iron garnets that combine robust perpendicular magnetic anisotropy (PMA) with low Gilbert damping are desirable for studies of magnetization dynamics as well as spintronic device development. This paper reports the magnetic properties of low‐damping bismuth‐substituted iron garnet thin films (Bi0.8Y2.2Fe5O12) grown on a series of single‐crystal gallium garnet substrates. The anisotropy is dominated by magnetoelastic and growth‐induced contributions. Both stripe and triangular domains form during field cycling of PMA films, with triangular domains evident in films with higher PMA. Ferromagnetic resonance measurements show damping as low as 1.3 × 10−4 with linewidths of 2.7 to 5.0 mT. The lower bound for the spin‐mixing conductance of BiYIG/Pt bilayers is similar to that of other iron garnet/Pt bilayers.