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Spin-polarized current effect is studied on the static and dynamic magnetization of the antiferromagnet in a ferromagnet - antiferromagnet nanojunction. The macrospin approximation is generalized to antiferromagnets. Canted…

材料科学 · 物理学 2011-12-13 E. M. Epshtein , Yu. V. Gulyaev , P. E. Zilberman

We develop a quantum analog of the classical spin-torque model for current-driven magnetic dynamics. The current-driven magnetic excitation at finite field becomes significantly incoherent. This excitation is described by an effective…

材料科学 · 物理学 2009-11-10 S. Urazhdin

A systematic investigation of spin injection behavior in Au/FM (FM = Fe and Ni) multilayers is performed using the superdiffusive spin transport theory. By exciting the nonmagnetic layer, the laser-induced hot electrons may transfer spin…

介观与纳米尺度物理 · 物理学 2023-11-20 Wen-Tian Lu , Zhe Yuan , Xiaohong Xu

Pure spin currents transport angular momentum without an associated charge flow. This unique property makes them attractive for spintronics applications, such as torque induced magnetization control in nanodevices that can be used for…

The dynamics of current-induced motion of a magnetic domain wall in a quasi-one-dimensional ferromagnet with both easy-axis and easy-plane anisotropy, is studied. We pay a special attention to the case of a sharp domain wall, and calculate…

材料科学 · 物理学 2009-11-11 V. K. Dugaev , V. R. Vieira , P. D. Sacramento , J. Barnas , M. A. N. Araujo , J. Berakdar

We show that the injection of a pure spin current (not accompanied by charge current) into a ring can induce a circulating charge current in the ring, provided that transport coefficients of the ring are spin-dependent and inhomogeneous. As…

介观与纳米尺度物理 · 物理学 2007-05-23 Soon-Wook Jung , Hyun-Woo Lee

Spin-orbit torque (SOT) created by a spin current injected into a ferromagnet by an adjacent heavy metal represents an efficient tool for the excitation and manipulation of spin waves. Here we report the micromagnetic simulations describing…

介观与纳米尺度物理 · 物理学 2023-10-20 Andrei I. Nikitchenko , Nikolay A. Pertsev

A possibility to excite a stable self-oscillation in a perpendicularly magnetized ferromagnet by the spin Hall effect is investigated theoretically. It had been shown that such self-oscillation cannot be stabilized solely by the direct spin…

介观与纳米尺度物理 · 物理学 2017-07-18 Tomohiro Taniguchi

Spin polarization induced by an external electric field in graphene is considered theoretically in the linear response regime. The graphene is assumed to be deposited on a substrate which leads to the spin-orbit interaction of Rashba type.…

介观与纳米尺度物理 · 物理学 2015-06-17 A. Dyrdał , J. Barnaś , V. K. Dugaev

Slow magnetic relaxation and two level fluctuations measurements under high current injection is performed in single-contacted ferromagnetic nanostructures. The magnetic configurations of the samples are described by two metastable states…

介观与纳米尺度物理 · 物理学 2009-11-10 J. -E. Wegrowe

Spin-transfer is a typical spintronics effect that allows a ferromagnetic layer to be switched by spin-injection. Most of the experimental results about spin transfer are described on the basis of the Landau-Lifshitz-Gilbert equation of the…

材料科学 · 物理学 2015-06-25 J. -E. Wegrowe , C. Ciornei , H. -J. Drouhin

We have investigated the current-induced spin transfer torque of a ferromagnet-insulator-ferromagnet tunnel junction by taking the spin-flip scatterings into account. It is found that the spin-flip scattering can induce an additional spin…

介观与纳米尺度物理 · 物理学 2009-11-10 Zhen-Gang Zhu , Gang Su , Biao Jin , Qing-Rong Zheng

The switching of magnetic layers is studied under the action of a spin current in a ferromagnetic metal/non-magnetic metal/ferromagnetic metal spin valve. We find that the main contribution to the switching comes from the non-equilibrium…

介观与纳米尺度物理 · 物理学 2009-10-31 C. Heide , P. E. Zilberman , R. J. Elliott

We report the rectifying effect of a constant-wave radio frequency (RF) current by a magnetic domain wall (DW) on a single-layered ferromagnetic wire. A direct-current (DC) voltage is generated by the spin torque diode effect, which is a…

材料科学 · 物理学 2007-06-13 A. Yamaguchi , T. Ono , Y. Suzuki , S. Yuasa , H. Miyajima

We provide a general procedure to calculate the current-induced spin-transfer torque which acts on a general steep magnetic texture due to the exchange interaction with an applied spin-polarized current. As an example, we consider a…

介观与纳米尺度物理 · 物理学 2016-01-20 Martin Stier , Michael Thorwart

We describe excitation of dipole-exchange spin waves in insulating magnetic thin films by spin current injection at the surface of the film. An easy-axis magnetic surface anisotropy can induce a non-chiral surface spin wave mode with…

材料科学 · 物理学 2013-05-10 Jiang Xiao , Yan Zhou , Gerrit E. W. Bauer

We study theoretically the detection and possible utilization of electric current-induced mechanical torques in ferromagnetic-normal metal heterostructures that are generated by spin-flip scattering or the absorption of transverse spin…

介观与纳米尺度物理 · 物理学 2010-01-01 Alexey A. Kovalev , Gerrit E. W. Bauer , Arne Brataas

Intrinsic spin currents are encountered in noncentrosymmetric crystals without any external electric fields; these currents are caused by spin-orbit interaction. In this paper, various theoretical aspects of this phenomenon in bulk…

材料科学 · 物理学 2024-11-11 Ilja Turek

Spin polarized currents originate a spin-transfer torque that enables the manipulation of magnetic textures. Here we theoretically study the effect of a spin-polarized current on the magnetic texture corresponding to a chiral soliton…

强关联电子 · 物理学 2022-09-21 S. A. Osorio , A. Athanasopoulos , V. Laliena , J. Campo , S. Bustingorry

In a ferromagnet--normal-metal--ferromagnet trilayer, a current flowing perpendicularly to the layers creates a torque on the magnetic moments of the ferromagnets. When one of the contacts is superconducting, the torque not only favors…

介观与纳米尺度物理 · 物理学 2007-05-23 Xavier Waintal , Piet W. Brouwer