(Fe1-xNix)5+δGeTe2单晶室温磁电阻效应的机制研究及应用展望

doi:10.12066/j.issn.1007-2861.2680

Abstract

Abstract: According to reports, Ni-doped Fe$_{5}$GeTe$_{2}$ single crystals have a Curie temperature ($T_{\rm C}$) of up to 478 K. Given the great potential of room-temperature van der Waals (vdW) ferromagnetic materials in spintronics, a series of (Fe$_{1-x}$Ni$_{x})_{5+\delta }$GeTe$_{2}$ single crystals were formed via the chemical vapor transport (CVT) method, so as to investigate the effect of Ni doping on the room-temperature magnetoresistance (MR) effect of Fe$_5$GeTe$_2$ single crystals. Moreover, their magnetic properties and room-temperature MR changes with Ni doping were measured using a physical property measurement system (PPMS) and a magnetic property measurement system (MPMS). The results show that the room-temperature MR evolves from linear negative magnetoresistance (NMR) to two nonlinear NMR types and then to linear positive magnetoresistance (PMR) with increasing Ni content. The microscopic mechanisms of different MR effects and their prospects in spintronic devices were analyzed.

Key words: van der Waals (vdW) ferromagnetic material, Curie temperature, magnetoresistance (MR) effect, spintronics

CLC Number:

O441

LONG Xiumin, PAN Haojie, CAO Guixin. Mechanism and prospects of room-temperature magnetoresistance effect in (Fe_1-xNi_x)_5+δGeTe₂ single crystals[J]. Journal of Shanghai University（Natural Science Edition）, 2025, 31(4): 657-665.

References

[1] Mermin N D, Wagner H. Absence of ferromagnetism or antiferromagnetism in one- or twodimensional isotropic heisenberg models [J]. Physical Review Letters, 1966, 17(22): 1133-1136.
[2] Novoselov K S, Jiang D, Schedin F, et al. Two-dimensional atomic crystals [J]. Proceedings of the National Academy of Sciences, 2005, 102(30): 10451-10453.
[3] Novoselov K S, Geim A K, Morozov S V, et al. Electric fleld efiect in atomically thin carbon fllms [J]. Science, 2004, 306(5696): 666-669.
[4] Gong C, Li L, Li Z L, et al. Discovery of intrinsic ferromagnetism in two-dimensional van der Waals crystals [J]. Nature, 2017, 546(7657): 265-269.
[5] Huang B, Clark G, Navarro-Moratalla E, et al. Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit [J]. Nature, 2017, 546(7657): 270-273.
[6] Geim A K, Grigorieva I V. Van der Waals heterostructures [J]. Nature, 2013, 499(7459): 419-425.
[7] Gong C, Zhang X. Two-dimensional magnetic crystals and emergent heterostructure devices [J]. Science, 2019, 363(6428): eaav4450.
[8] Li X M, Tao L, Chen Z F, et al. Graphene and related two-dimensional materials: structureproperty relationships for electronics and optoelectronics [J]. Applied Physics Reviews, 2017, 4(2): 021306.
[9] Zhuo W Z, Lei B, Wu S, et al. Manipulating ferromagnetism in few-layered Cr₂Ge₂Te₆ [J]. Advanced Materials, 2021, 33(31): 2008586.
[10] Iimori R, Hu S, Mitsuda A, et al. Substantial enhancement of perpendicular magnetic anisotropy in van der Waals ferromagnetic Fe₃GaTe₂ fllm due to pressure application [J]. Communications Materials, 2024, 5(1): 235.
[11] Huang P, Zhang P, Xu S, et al. Recent advances in two-dimensional ferromagnetism: materials synthesis, physical properties and device applications [J]. Nanoscale, 2020, 12(4): 2309-2327.
[12] Seo J, Kim D Y, An E S, et al. Nearly room temperature ferromagnetism in a magnetic metal-rich van der Waals metal [J]. Science Advances, 2020, 6(3): eaay8912.
[13] May A F, Ovchinnikov D, Zheng Q, et al. Ferromagnetism near room temperature in the cleavable van der Waals crystal Fe₅GeTe₂ [J]. ACS Nano, 2019, 13(4): 4436-4442.
[14] Hu X, Yao D X, Cao K. (Fe_1-xNi_x)₅GeTe₂: an antiferromagnetic triangular Ising lattice with itinerant magnetism [J]. Physical Review B, 2022, 106(22): 224423.
[15] Tian C, Pan F, Xu S, et al. Tunable magnetic properties in van der Waals crystals (Fe_1-xNi_x)₅GeTe₂ [J]. Applied Physics Letters, 2020, 116(20): 202402.
[16] Chen X, Shao Y T, Chen R, et al. Pervasive beyond room-temperature ferromagnetism in a doped van der Waals magnet [J]. Physical Review Letters, 2022, 128(21): 217203.
[17] Zhang H, Raftrey D, Chan Y T, et al. Room-temperature skyrmion lattice in a layered magnet (Fe_0.5Co_0.5)₅GeTe₂ [J]. Science Advances, 2022, 8(12): eabm7103.
[18] Coey J M D, Berkowitz A E, Balcells L, et al. Magnetoresistance of magnetite [J]. Applied Physics Letters, 1998, 72(6): 734-736.
[19] Kent A D, Yu J, Rudiger U, et al. Domain wall resistivity in epitaxial thin fllm microstructures [J]. Journal of Physics: Condensed Matter, 2001, 13(25): R461-R488.
[20] Chen J, Li H, Ding B, et al. Tunable positive magnetoresistance and crossover from weak antilocalization to weak localization transition in half-Heusler compounds RPtBi (R = lanthanide) [J]. Applied Physics Letters, 2020, 116(10): 101902.
[21] Bergmann G. Localization in thin fllms: a time-of-flight-experiment with conduction electrons [J]. Physica B+C, 1984, 126(1/2/3): 229-234.
[22] Li Z G, Zhang J C, Zhou M J, et al. Weak localization in 1T-TiSe₂ microflakes [J]. Physical Review B, 2020, 101(15): 155111.
[23] Li C Z, Wang L X, Liu H, et al. Giant negative magnetoresistance induced by the chiral anomaly in individual Cd₃As₂ nanowires [J]. Nature Communications, 2015, 6(1): 10137.
[24] Huang X C, Zhao L X, Long Y J, et al. Observation of the chiral-anomaly-induced negative magnetoresistance in 3D Weyl semimetal taAs [J]. Physical Review X, 2015, 5(3): 031023.
[25] Kaul S N. Spin-wave and spin-fluctuation contributions to the magnetoresistance of weak itinerant-electron ferromagnets [J]. Journal of Physics: Condensed Matter, 2005, 17(36): 5595- 5612.
[26] Khosl R P, Fischer J R. Magnetoresistance in degenerate CdS: localized magnetic moments [J]. Physical Review B, 1970, 2(10): 4084-4097.
[27] Raquet B, Viret M, Sondergard E, et al. Electron-magnon scattering and magnetic resistivity in 3D ferromagnets [J]. Physical Review B, 2002, 66(2): 024433.
[28] He Y, Gayles J, Yao M, et al. Large linear non-saturating magnetoresistance and high mobility in ferromagnetic MnBi [J]. Nature Communications, 2021, 12(1): 4576.
[29] Hu J, Rosenbaum T F. Classical and quantum routes to linear magnetoresistance [J]. Nature Materials, 2008, 7(9): 697-700.
[30] Feng J Y, Pang Y, Wu D S, et al. Large linear magnetoresistance in Dirac semimetal Cd₃As₂ with Fermi surfaces close to the Dirac points [J]. Physical Review B, 2015, 92(8): 081306.
[31] Jung J, Laksono E, Dasilva A M, et al. Moir band model and band gaps of graphene on hexagonal boron nitride [J]. Physical Review B, 2017, 96(8): 085442.
[32] Zou X, Wang R, Xie M, et al. Nonsaturating linear magnetoresistance manifesting twodimensional transport in wet-chemical patternable Bi₂O₂Te thin fllms [J]. Nano Letters, 2023, 23(24): 11742-11748.
[33] Pan H, Singh A K, Zhang C, et al. Room-temperature tunable tunneling magnetoresistance in Fe₃GaTe₂/WSe₂/Fe₃GaTe₂ van der Waals heterostructures [J]. InfoMat, 2024, 6(6): e12504.
[34] Escolar J, Peimyoo N, Craciun M F, et al. Anisotropic magnetoconductance and Coulomb blockade in defect engineered Cr₂Ge₂Te₆ van der Waals heterostructures [J]. Physical Review B, 2019, 100(5): 054420.
[35] Li Y J, Yin R T, Li M Z, et al. Observation of Yu-Shiba-Rusinov-like states at the edge of CrBr₃/NbSe₂ heterostructure [J]. Nature Communications, 2024, 15(1): 10121.
[36] Fan K, Jin H, Huang B, et al. Artiflcial superconducting Kondo lattice in a van der Waals heterostructure [J]. Nature Communications, 2024, 15(1): 8797.
[37] Li P G, Zhang J H, Zhu D, et al. Observation of in-gap states in a two-dimensional CrI₂/NbSe₂ heterostructure [J]. Nano Letters, 2024, 24(31): 9468-9476.
[38] Hu G J, Wang C L, Wang S S, et al. Long-range skin Josephson supercurrent across a van der Waals ferromagnet [J]. Nature Communications, 2023, 14(1): 1779.

Mechanism and prospects of room-temperature magnetoresistance effect in (Fe_1-xNi_x)_5+δGeTe₂ single crystals

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Mechanism and prospects of room-temperature magnetoresistance effect in (Fe1-xNix)5+δGeTe2 single crystals

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Mechanism and prospects of room-temperature magnetoresistance effect in (Fe_1-xNi_x)_5+δGeTe₂ single crystals