Spin-motive force due to a gyrating magnetic vortex

Tanabe, Kenji; Chiba, Daichi; Ohe, Jun–ichiro; Kasai, S.; Kohno, Hiroshi; Barnes, S. E.; Maekawa, Sadamichi; Kobayashi, Kensuke; Ono, Teruo

doi:10.1038/ncomms1824

Cited by 53 publications

(41 citation statements)

References 18 publications

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“…In this sense, the Berry phase formalism is equivalent to the spin electric field formalism. Fueled by the verification of the prediction by Barnes and Maekawa, the concept of the SMF has attracted researchers, and there has been some progress in both experiment [75][76][77][78][79] and theory. [107][108][109][110][111][112][113][114][115][116][117][118] In 2011, Yamane et al provided a new formalism of SMF, where the equation of motion of a conduction electron is studied, as will be detailed in the following.…”

Section: Spinmotive Forcementioning

confidence: 99%

Spin Current: Experimental and Theoretical Aspects

et al. 2013

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The flow of electron spin, the so-called ''spin current'', is a key concept in the recent progress in spintronics. When the spin current interacts with the magnetic moment in a ferromagnetic metal, the angular momentum and energy conservations give rise to the spin transfer torque and spinmotive force, respectively. When it is injected into a nonmagnetic metal attached to a ferromagnet, the electric current is induced through the spin-charge conversion mechanism (inverse spin Hall effect). The generation and manipulation of the spin current and a variety of novel phenomena given by the spin current, including the spin Seebeck effect and spinmotive force, are discussed.

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Section: Spinmotive Forcementioning

confidence: 99%

Spin Current: Experimental and Theoretical Aspects

et al. 2013

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“…It is well known that when electrons flow in a nontrivial magnetic texture, they experience an emergent electromagnetic field [12,13]. The emergent electric field E s i = (sh/2e)m · (∂ t m × ∂ i m) produces a spin motive force [14,15], i.e., a time-dependent magnetization (∂ t m = 0) induces a local spin current [12,13]. The emergent magnetic field B s = (−sh/2e)m · (∂ x m × ∂ y m)z creates an effective Lorentz force [16] on the flowing electron that changes sign on the two opposite spins, creating a local, spin-dependent OHE.…”

Section: Introductionmentioning

confidence: 99%

Topological Hall and spin Hall effects in disordered skyrmionic textures

2017

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We carry out a thorough study of the topological Hall and topological spin Hall effects in disordered skyrmionic systems: the dimensionless (spin) Hall angles are evaluated across the energy-band structure in the multiprobe Landauer-Büttiker formalism and their link to the effective magnetic field emerging from the real-space topology of the spin texture is highlighted. We discuss these results for an optimal skyrmion size and for various sizes of the sample and find that the adiabatic approximation still holds for large skyrmions as well as for nanoskyrmions. Finally, we test the robustness of the topological signals against disorder strength and show that the topological Hall effect is highly sensitive to momentum scattering.

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“…The experiments that have observed SMF so far are all done in FMs [15][16][17][18][19]. A question naturally arises; can one expect SMF in materials with different magnetic orderings from FM, such as antiferromagnets (AFMs) [20][21][22]?…”

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confidence: 99%

Electric voltage generation by antiferromagnetic dynamics

2016

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We theoretically demonstrate dc and ac electric voltage generation due to spinmotive forces originating from domain wall motion and magnetic resonance, respectively, in two-sublattice antiferromagnets. Our theory accounts for the canting between the sublattice magnetizations, the nonadiabatic electron spin dynamics, and the Rashba spin-orbit coupling, with the inter-sublattice electron dynamics treated as a perturbation. This work suggests a new way to observe and explore the dynamics of antiferromagnetic textures by electrical means, an important aspect in the emerging field of antiferromagnetic spintronics, where both manipulation and detection of antiferromagnets are needed.Introduction.-In magnetic materials, the exchange interaction between the conduction electron spin and the local magnetization is responsible for a variety of important phenomena. Among the spintronic effects caused by this interaction, spin-transfer torque provides a path to promising information technology by enabling the angular momentum to be transferred between the electrons and magnetization [1,2]. The same interaction can also mediate a transfer of energies between the two channels. Such a transfer is mediated by the spinmotive force (SMF) [3][4][5][6], where magnetic energies stored by the magnetization can be transformed to an electric voltage. Theoretically, the SMF is attributed to a spin-dependent electric field arising due to the exchange interaction [7][8][9][10][11][12][13][14], termed spin electric field. The SMF reflects the temporal and spatial variations of the magnetization, and thus offers a powerful way of probing and exploring the dynamics and nature of various magnetic textures.

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Spin-motive force due to a gyrating magnetic vortex

Cited by 53 publications

References 18 publications

Spin Current: Experimental and Theoretical Aspects

Spin Current: Experimental and Theoretical Aspects

Topological Hall and spin Hall effects in disordered skyrmionic textures

Electric voltage generation by antiferromagnetic dynamics

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