Probing antiferromagnetic coupling in magnetic insulator/metal heterostructures

被引：4

作者：

Quarterman, Patrick ^{[1
]}

Fan, Yabin ^{[2
]}

Chen, Zhijie ^{[3
]}

Jensen, Christopher J. ^{[3
]}

V. Chopdekar, Rajesh ^{[4
]}

Gilbert, Dustin A. ^{[5
]}

Holtz, Megan E. ^{[6
,7
]}

Stiles, Mark D. ^{[8
]}

Borchers, Julie A. ^{[1
]}

Liu, Kai ^{[3
]}

Liu, Luqiao ^{[2
]}

Grutter, Alexander J. ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, NIST Ctr Neutron Res, 100 Bur Dr, Gaithersburg, MD 20899 USA

[2] MIT, Microsyst Technol Labs, Cambridge, MA 02139 USA

[3] Georgetown Univ, Phys Dept, Washington, DC 20057 USA

[4] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[6] Natl Inst Stand & Technol, Mat Measurement Lab, 100 Bur Dr, Gaithersburg, MD 20899 USA

[7] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA

[8] Natl Inst Stand & Technol, Ctr Nanoscale Sci & Technol, 100 Bur Dr, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW MATERIALS | 2022年 / 6卷 / 09期

基金：

美国国家科学基金会;

关键词：

OFF-SPECULAR SCATTERING;

D O I：

10.1103/PhysRevMaterials.6.094418

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using depth- and element-resolved characterization, we report insights into antiferromagnetic coupling in Y3Fe5O12/permalloy (YIG/Py) and Y3Fe5O12/Co (YIG/Co) thin-film heterostructures grown on Si/SiO2 and Gd3Ga5O12 substrates. We build on recent work demonstrating antiferromagnetic coupling in polycrystalline YIG/metallic-ferromagnetic systems by characterizing differences in the structural and magnetic properties which depend on the choice of ferromagnet (Py vs Co), seed layer (with and without Pt), and substrate (Si/SiO2 vs Gd3Ga5O12). These differences in the sample structure manifest as notable changes in interface coupling sign, magnetic reversal mechanisms, magnetic depth profiles, and domain structure. Through a combination of magnetometry, polarized neutron reflectometry, and x-ray photoemission electron microscopy, a comprehensive picture of the magnetic interactions is realized, with lateral- and depth resolution at submicrometer and nanometer scales, respectively. These results confirm that both Co and Py share a preference to align antiparallel to polycrystalline YIG grown on some substrates (Si/SiO2 and Si/SiO2/Pt), while coupling ferromagnetically with highly oriented YIG on (111) Gd3Ga5O12 and (110) Gd3Ga5O12/Pt substrates. The complex interplay among magnetic interactions at the YIG/ferromagnetic interface has important implications for spintronic and magnonic devices based on this platform.

引用

页数：11

共 49 条

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