Magnetic Damping Modulation in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>IrMn</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mrow><mml:mi>Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>80</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>20</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
 via the Magnetic Spin Hall Effect

Holanda, J.; Sağlam, Hilal; Karakas, Vedat; Zang, Zhizhi; Li, Yang; Divan, Ralu; Liu, Yuzi; Ozatay, O.; Novosad, V.; Pearson, John; Hoffmann, A.

doi:10.1103/physrevlett.124.087204

Cited by 56 publications

(28 citation statements)

References 37 publications

(44 reference statements)

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“…On the other hand, from the values of the calculated spin Hall angles, it is possible to write the following relation θ SH-Pt ≈ 3.92 θ SH-Pd ≈ 1.24 θ SH-IrMn . The results obtained for the voltage peaks and the spin Hall angle are in agreement with values reported in the literature [1][2][3][4][5][6][7]18] and confirm the good quality of the interfaces of the YIG/ML bilayer samples used here.…”

Section: Resultssupporting

confidence: 91%

Spin-to-charge conversion and interface-induced spin Hall magnetoresistance in yttrium iron garnet/metallic bilayers

Holanda¹,

Alves²,

Mendes³

et al. 2021

J. Phys.: Condens. Matter

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We report the investigation of spin-to-charge current interconversion process in hybrid structures of yttrium iron garnet (YIG)/metallic bilayers by means of two different experimental techniques: spin pumping effect (SPE) and spin Hall magnetoresistance (SMR). We demonstrate the evidence of a correlation between spin-to-charge conversion and SMR in bilayers of YIG/Pd, YIG/Pt, and YIG/IrMn. The correlation was verified directly in the spin Hall angles and the amplitudes of the voltage signals measured by the SPE and SMR techniques. The detection of SMR was carried out using the modulated magnetoresistance technique and lock-in amplifier detection. For these measurements, we present a simple model for the interpretation of the results. The results allow us to conclude that indeed the interface in the YIG/metallic bilayers has a dominant role in the spin-to-charge current conversion and SMR.

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Section: Resultssupporting

confidence: 91%

Spin-to-charge conversion and interface-induced spin Hall magnetoresistance in yttrium iron garnet/metallic bilayers

Holanda¹,

Alves²,

Mendes³

et al. 2021

J. Phys.: Condens. Matter

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“…In this case, the contribution of MCP is small compared with SR [9,11]. The SR and MCP effects are activated easily in Py films and controlled by the spin Hall effect [11,45,46], but there are no reports of control through thermal effects.…”

Section: Resultsmentioning

confidence: 92%

“…(1) as previously described. Even with the length of the Py film of 5 mm and nonuniform microwave excitation, only the uniform mode is excited, which is commonly obtained in Py [11][12][13][14]18,[45][46][47].…”

Section: Resultsmentioning

confidence: 99%

Thermal Control of the Intrinsic Magnetic Damping in a Ferromagnetic Metal

2021

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We report experiments on the control of intrinsic magnetic damping by thermal torque effects produced by the spin Seebeck effect and the anomalous Nernst effect in a thin layer of a ferromagnetic metal (Permalloy (Py), Ni 81 Fe 19 ). Damping is measured in ferromagnetic resonance (FMR) experiments on a sample excited by microwave radiation and detected by the dc-voltage-generated spin rectification and magnonic charge pumping in the Py film. Application of a temperature gradient in the longitudinal configuration increases or decreases the dc-voltage line width, depending on the sign of the thermal gradient, demonstrating that the magnetic damping in Py is controlled by currents generated by thermal effects. The absolute values of the line-width changes in Py may reach 1 order of magnitude larger than in the ferrimagnetic insulator yttrium iron garnet. The large change in magnetic damping is interpreted as a superposition of different phenomena in the same metallic ferromagnet.

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“…Remarkable breakthroughs in antiferromagnets (AFMs) [1,2] have been achieved in spintronics regarding exchange bias-induced field-free switching [3][4][5], magnetic spin Hall effect (MSHE) [6,7], and antiferromagnetic spin Hall effect (AFM-SHE) [8]. These intriguing phenomena have led to the establishment of antiferromagnetic spin-orbitronics to further manipulate magnetization effectively for spintronic devices because they are free from the restriction of symmetry regarding spin polarization of the generated spin current, like the conventional spin Hall effect (SHE).…”

mentioning

confidence: 99%

“…These intriguing phenomena have led to the establishment of antiferromagnetic spin-orbitronics to further manipulate magnetization effectively for spintronic devices because they are free from the restriction of symmetry regarding spin polarization of the generated spin current, like the conventional spin Hall effect (SHE). While the somewhat novel phenomena concerning unconventional spin-orbit torque in AFMs, such as IrMn 3 [7], PtMn 3 [9], and Mn 2 Au [8] using 5d elements, still depend on spin-orbit coupling, it is difficult to uncover the mechanism generating the torque via the magnetic order. Recently, a spin-split band, through the antiferromagnetic order, was theoretically predicted to cause non-trivial torque, such as x-and z-polarized damping-like (DL) torque, even without spin-orbit coupling.…”

mentioning

confidence: 99%

Observation of spin-splitter torque in collinear antiferromagnetic RuO$_2$

Karube,

Tanaka,

Sugawara

et al. 2021

Preprint

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The spin-splitter effect is theoretically predicted to generate an unconventional spin current with x -and z -spin polarization via the spin-split band in antiferromagnets. The generated torque, namely spin-splitter torque, is effective for the manipulation of magnetization in an adjacent magnetic layer without an external magnetic field for spintronic devices such as MRAM. Here, we study the generation of torque in collinear antiferromagnetic RuO2 with (100), (101), and (001) crystal planes. Next we find all x -, y-, and z -polarized spin currents depending on the Néel vector direction in RuO2(101). For RuO2( 100) and ( 001), only y-polarized spin current was present, which is independent of the Néel vector. Using the z -polarized spin currents, we demonstrate field-free switching of the perpendicular magnetized ferromagnet at room temperature. The spin-splitter torque generated from RuO2 is verified to be useful for the switching phenomenon and paves the way for a further understanding of the detailed mechanism of the spin-splitter effect and for developing antiferromagnetic spin-orbitronics.

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Magnetic Damping Modulation in IrMn3/Ni80Fe20 via the Magnetic Spin Hall Effect

Cited by 56 publications

References 37 publications

Spin-to-charge conversion and interface-induced spin Hall magnetoresistance in yttrium iron garnet/metallic bilayers

Spin-to-charge conversion and interface-induced spin Hall magnetoresistance in yttrium iron garnet/metallic bilayers

Thermal Control of the Intrinsic Magnetic Damping in a Ferromagnetic Metal

Observation of spin-splitter torque in collinear antiferromagnetic RuO$_2$

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