journal article·2025-08-01Open access

Crystalline phase dependence of the inverse spin Hall effect in Sb2Te3/CoFeB bilayers

Misako Morota, Wipakorn Jevasuwan, Hiroyasu Nakayama, Naoki Fukata, Yuta Saito

APL Materials· Volume 13· Issue 8

Abstract

Sb2Te3 is a layered material with the properties of both a topological insulator and a phase-change material. In this study, to investigate the relationship between the spin current-to-charge current conversion efficiency of Sb2Te3 and its phase, we fabricated Sb2Te3/CoFeB bilayers with varying Sb2Te3 thicknesses. The electromotive force induced at both ends of the bilayer was measured as a result of the scattering of the spin current injected into Sb2Te3 by spin pumping due to ferromagnetic resonance, the so-called inverse spin Hall effect (ISHE). Two different Sb2Te3 phases—crystalline and amorphous—were prepared, and the phase dependence of the ISHE was investigated. The ISHE of the crystalline Sb2Te3 film exhibited a strong dependence on thickness, whereas the amorphous phase showed only a minor variation with thickness. These findings contribute to the development of novel devices that exploit both the charge and spin degrees of freedom in topological insulator-based spintronic applications.
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Research context

OpenAlex topics: Magnetic properties of thin films · Topological Materials and Phenomena · Phase-change materials and chalcogenides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Institute of Advanced Industrial Science and Technology, Semiconductor Frontier Research Center 1 , Tsukuba Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568,

Research Center for Materials Nanoarchitectonics, National Institute for Materials Science 2 , 1-1 Namiki, Tsukuba, Ibaraki 305-0044,

National Institute of Advanced Industrial Science and Technology, Research Institute for Hybrid Functional Integration 3 , 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568,

Research Center for Green X-Tech, Tohoku University 4 , 6-6-11, Aoba-yama, Aoba-ku, Sendai 980-8579,

Department of Materials Science, Graduate School of Engineering, Tohoku University 5 , 6-6-11, Aoba-yama, Aoba-ku, Sendai 980-8579,

Funding

Japan Society for the Promotion of Science · Precursory Research for Embryonic Science and Technology

References (40)

Show source-provided references
1. Nat. Mater. · 2007 · 6 · 82410.1038/nmat2009 ↗
2. Semicond. Sci. Technol. · 2018 · 33 · 01300210.1088/1361-6641/aa7c25 ↗
3. Rev. Mod. Phys. · 2010 · 82 · 304510.1103/RevModPhys.82.3045 ↗
4. APL Mater. · 2021 · 9 · 06090110.1063/5.0048619 ↗
5. Nat. Phys. · 2016 · 12 · 102710.1038/nphys3833 ↗
6. Phys. Rev. Lett. · 2014 · 113 · 19660110.1103/PhysRevLett.113.196601 ↗
7. Phys. Rev. Lett. · 2016 · 116 · 25680210.1103/PhysRevLett.116.256802 ↗
8. Proc. Natl. Acad. Sci. U. S. A. · 2023 · 120 · e221503012010.1073/pnas.2215030120 ↗
9. Physica Status Solidi RRL · 2021 · 15 · 210024710.1002/pssr.202100247 ↗
10. Phys. Rev. Lett. · 2020 · 125 · 01720410.1103/PhysRevLett.125.017204 ↗
11. Sci. Adv. · 2018 · 4 · eaas866010.1126/sciadv.aas8660 ↗
12. Phys. Rev. B · 2021 · 103 · 01441910.1103/physrevb.103.014419 ↗
13. Phys. Rev. B · 2024 · 110 · 02440810.1103/physrevb.110.024408 ↗
14. Phys. Rev. Appl. · 2019 · 11 · 05403210.1103/PhysRevApplied.11.054032 ↗
15. Appl. Phys. Lett. · 2006 · 88 · 18250910.1063/1.2199473 ↗
16. J. Magn. Magn. Mater. · 2001 · 226–230 · 164010.1016/S0304-8853(00)01097-0 ↗
17. Phys. Rev. Lett. · 2002 · 88 · 11760110.1103/PhysRevLett.88.117601 ↗
18. Rev. Mod. Phys. · 2005 · 77 · 137510.1103/RevModPhys.77.1375 ↗
19. Phys. Rev. Lett. · 2011 · 106 · 03660110.1103/PhysRevLett.106.036601 ↗
20. Science · 2012 · 336 · 55510.1126/science.1218197 ↗
21. Nano Lett. · 2020 · 20 · 589310.1021/acs.nanolett.0c01850 ↗
22. Nat. Commun. · 2017 · 8 · 136410.1038/s41467-017-01583-4 ↗
23. J. Magn. Magn. Mater. · 2019 · 474 · 63210.1016/j.jmmm.2018.12.009 ↗
24. Phys. Rev. Mater. · 2023 · 7 · 02440610.1103/PhysRevMaterials.7.024406 ↗
25. Adv. Mater. Interfaces · 2020 · 7 · 200090510.1002/admi.202000905 ↗
26. Mater. Sci. Semicond. Process. · 2021 · 135 · 10607910.1016/j.mssp.2021.106079 ↗
27. Bestimmung der Größe und der inneren Struktur von Kolloidteilchen mittels Röntgenstrahlen
28. Surf. Interfaces · 2024 · 51 · 10448610.1016/j.surfin.2024.104486 ↗
29. Appl. Phys. Lett. · 2018 · 112 · 26240310.1063/1.5033418 ↗
30. Phys. Rev. B · 2012 · 85 · 14440810.1103/PhysRevB.85.144408 ↗
31. Nat. Commun. · 2018 · 9 · 22310.1038/s41467-017-02743-2 ↗
32. Jpn. J. Appl. Phys. · 2001 · 40 · 58010.1143/jjap.40.580 ↗
33. Appl. Phys. Lett. · 2013 · 103 · 03240210.1063/1.4813763 ↗
34. J. Appl. Phys. · 2015 · 117 · 16390110.1063/1.4918909 ↗
35. Phys. Rev. B · 2024 · 109 · L02040610.1103/PhysRevB.109.L020406 ↗
36. Appl. Phys. Lett. · 2012 · 101 · 04240310.1063/1.4738786 ↗
37. Key Eng. Mater. · 2012 · 508 · 26610.4028/www.scientific.net/kem.508.266 ↗
38. Adv. Funct. Mater. · 2022 · 32 · 210936110.1002/adfm.202109361 ↗
39. Nano Lett. · 2025 · 25 · 688810.1021/acs.nanolett.4c06658 ↗
40. Adv. Funct. Mater. · 2023 · 33 · 230387810.1002/adfm.202303878 ↗