Strong modification of intrinsic spin Hall effect in FeMn with antiferromagnetic order formation

Kang, Yun; Chang, Y. S.; He, Wei; Cai, Jianwang; Kang, Shishou

doi:10.1039/c6ra22256k

Cited by 7 publications

(3 citation statements)

References 38 publications

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“…The saturation fields in the out‐of‐plane magnetization curves are 2400 (100 K) and 2000 Oe (300 K), which are interpreted as the shape anisotropy of the YIG thin film, 4 πM YIG . These magnetic characteristics are consistent with those of the YIG thin films reported previously …”

Section: Resultssupporting

confidence: 92%

Dirac Cone Spin Polarization of Graphene by Magnetic Insulator Proximity Effect Probed with Outermost Surface Spin Spectroscopy

Sakai

Erohin

Попов

et al. 2018

Adv Funct Materials

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The effects of the proximity contact with magnetic insulator on the spin-dependent electronic structure of graphene are explored for the heterostructure of single-layer graphene (SLG) and yttrium iron garnet Y 3 Fe 5 O 12 (YIG) by means of outermost surface spin spectroscopy using a spin-polarized metastable He atom beam. In the SLG/YIG heterostructure, the Dirac cone electrons of graphene are found to be negatively spin polarized in parallel to the minority spins of YIG with a large polarization degree, without giving rise to significant changes in the π band structure. Theoretical calculations reveal the electrostatic interfacial interactions providing a strong physical adhesion and the indirect exchange interaction causing the spin polarization of SLG at the interface with YIG. The Hall device of the SLG/ YIG heterostructure exhibits a nonlinear Hall resistance attributable to the anomalous Hall effect, implying the extrinsic spin-orbit interactions as another manifestation of the proximity effect.

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Section: Resultssupporting

confidence: 92%

Dirac Cone Spin Polarization of Graphene by Magnetic Insulator Proximity Effect Probed with Outermost Surface Spin Spectroscopy

Sakai

Erohin

Попов

et al. 2018

Adv Funct Materials

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“…We further expect noncoplanar magnets to exhibit analogously a topological spin Hall effect (see also ref. 44) stemming solely from the nontrivial topology of the spin texture, without any reference to spin-orbit coupling.…”

Section: Discussionmentioning

confidence: 99%

Prototypical topological orbital ferromagnet γ-FeMn

Hanke¹,

Freimuth²,

Blügel³

et al. 2017

Sci Rep

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We predict from first principles an entirely topological orbital magnetization in the noncoplanar bulk antiferromagnet γ-FeMn originating in the nontrivial topology of the underlying spin structure, without any reference to spin-orbit interaction. Studying the influence of strain, composition ratio, and spin texture on the topological orbital magnetization and the accompanying topological Hall effect, we promote the scalar spin chirality as key mechanism lifting the orbital degeneracy. The system is thus a prototypical topological orbital ferromagnet, the macroscopic orbital magnetization of which is prominent even without spin-orbit coupling. One of the remarkable features of γ-FeMn is the possibility for pronounced orbital magnetostriction mediated by the complex spin topology in real space.

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“…However, recently, it has been recognized that non-collinear antiferromagnetic spin textures result in Berry phases that profoundly change charge transport by generating anomalous Hall effects 17,18 . In addition, γ -Fe 50 Mn 50 layers exhibit spin-Hall magnetoresistance and large inverse spin-Hall effect voltage, implying that the antiferromagnetic materials can be both spin current detector and generator 19–21 . These investigations open up new opportunities in developing the antiferromagnetic based spintronic devices.…”

Section: Introductionmentioning

confidence: 99%

Induced high-temperature ferromagnetism by structural phase transitions in strained antiferromagnetic γ-Fe50Mn50 epitaxial films

Hwang

Choi

et al. 2019

Sci Rep

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Strain effects in epitaxial films can substantially enhance individual functional properties or induce properties which do not exist in corresponding bulk materials. The bcc α -Fe 50 Mn 50 films are a ferromagnetic with a Curie temperature between 650 K and 750 K, which do not exist in nature can be manipulated through the tensile strain. In this study, γ -Fe 50 Mn 50 epitaxial films grown on GaAs(001) using molecular beam epitaxy are found to structural transition from the face-centered-cubic (fcc, a = 0.327 nm) γ -phase to the body-centered-cubic (bcc, a = 0.889 nm) α -phase. For α -Fe 50 Mn 50 epitaxial films, ferromagnetism is accompanied by structural phase transition due to the tensile strain induced by the differences of the thermal expansion between the film and the substrate. Moreover, by realizing in epitaxial films with fcc structure a tensile strain state, phase transitions were introduced Fe-Mn alloy system with bcc structure. These findings are of fundamental importance to understanding the mechanism of phase transition and properties of epitaxial CuAu-I type antiferromagnetic alloy thin films under strain.

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Strong modification of intrinsic spin Hall effect in FeMn with antiferromagnetic order formation

Abstract: FeMn films with and without a Cu seed layer were deposited on Y3Fe5O12 (YIG) substrates, and their inverse spin Hall effect (ISHE) was examined through both spin Seebeck effect and spin pumping.

Cited by 7 publications

References 38 publications

Dirac Cone Spin Polarization of Graphene by Magnetic Insulator Proximity Effect Probed with Outermost Surface Spin Spectroscopy

Dirac Cone Spin Polarization of Graphene by Magnetic Insulator Proximity Effect Probed with Outermost Surface Spin Spectroscopy

Prototypical topological orbital ferromagnet γ-FeMn

Induced high-temperature ferromagnetism by structural phase transitions in strained antiferromagnetic γ-Fe50Mn50 epitaxial films

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