Damping and Interfacial Dzyaloshinskii-Moriya Interaction in Thulium Iron Garnet/Bismuth-Substituted Yttrium Iron Garnet Bilayers

被引：7

作者：

Fakhrul, Takian ^{[1
]}

Khurana, Bharat ^{[1
]}

Lee, Byung Hun ^{[1
]}

Huang, Siying ^{[1
]}

Nembach, Hans T. ^{[2
,3
]}

Beach, Geoffrey S. D. ^{[1
]}

Ross, Caroline A. ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] NIST, Phys Measurement Lab, Boulder, CO 80305 USA

[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2024年 / 16卷 / 02期

关键词：

spintronics; magnetism; damping; garnets; interfaces; thin films; INDUCED MAGNETIC-ANISOTROPY; THIN-FILMS; FREQUENCY; SKYRMIONS; DRIVEN; GROWTH;

D O I：

10.1021/acsami.3c14706

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thin films of ferrimagnetic iron garnets can exhibit useful magnetic properties, including perpendicular magnetic anisotropy (PMA) and high domain wall velocities. In particular, bismuth-substituted yttrium iron garnet (BiYIG) films grown on garnet substrates have a low Gilbert damping but zero Dzyaloshinskii-Moriya interaction (DMI), whereas thulium iron garnet (TmIG) films have higher damping but a nonzero DMI. We report the damping and DMI of thulium-substituted BiYIG (BiYTmIG) and TmIG|BiYIG bilayer thin films deposited on (111) substituted gadolinium gallium garnet and neodymium gallium garnet (NGG) substrates. The films are epitaxial and exhibit PMA. BiYIG|TmIG bilayers have a damping value that is an order of magnitude lower than that of TmIG, and BiYIG|TmIG|NGG have DMI of 0.0145 +/- 0.0011 mJ/m(2), similar to that of TmIG|NGG. The bilayer therefore provides a combination of DMI and moderate damping, useful for the development of high-speed spin orbit torque-driven devices.

引用

页码：2489 / 2496

页数：8

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