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The discovery that a spin polarized current can exert a large torque on a ferromagnet through a transfusion of spin angular momentum, offers a new way to control a magnetization by simple current injection, without the help of an applied…

The magnetization in the domain walls (DWs) formed inside the inner core of the amorphous ferromagnetic microwire is studied within a simple analytical model proposed. The influence of the ordering in the internal-stress created outer shell…

Mesoscale and Nanoscale Physics · Physics 2015-09-10 Andrzej Janutka , Przemyslaw Gawronski

A wire that conducts an electric current will give rise to circular magnetic field (the \O{}rsted magnetic field), which can be calculated using the Maxwell-Ampere equation. For wires with diameters in the macroscopic scale, the…

Mesoscale and Nanoscale Physics · Physics 2021-09-21 Sherif Abdulkader Tawfik

A simulation study for the magnetization process is performed for the multi-domain state in a chiral p-wave superconductor, using the time-dependent Ginzburg-Landau theory. The external field penetrates inside as core-less vortices through…

Superconductivity · Physics 2007-08-01 Masanori Ichioka , Yasushi Matsunaga , Kazushige Machida

Switching of the direction of the magnetic moment in a nanomagnet is studied within a modified Slonczewski's model that permits torsional oscillations of the magnet. We show that the latter may inhibit or assist the magnetization switching,…

Mesoscale and Nanoscale Physics · Physics 2014-03-03 Liufei Cai , Reem Jaafar , Eugene M. Chudnovsky

Molecular beam epitaxy is used to fabricate magnetic single and double layer junctions which are deposited in prefabricated nanostencil masks. For all Co | Cu | Co double layer junctions we observe a stable intermediate resistance state…

Mesoscale and Nanoscale Physics · Physics 2021-03-25 N. Müsgens , E. Maynicke , M. Weidenbach , C. J. P. Smits , M. Bückins , J. Mayer , B. Beschoten , G. Güntherodt

It was shown by micromagnetic simulation that a current-driven in-plane magnetized magnetic nano-contact, besides a quasi-linear propagating ("Slonczewski") spin wave mode, can also support a nonlinear self-localized spin wave "bullet" mode…

Materials Science · Physics 2009-11-13 G. Consolo , B. Azzerboni , G. Gerhart , G. A. Melkov , V. Tiberkevich , A. N. Slavin

We study the coupled current and magnetization noise in magnetic nanostructures by magnetoelectronic circuit theory. Spin current fluctuations, which depend on the magnetic configuration, are found to be an important source of magnetization…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Jorn Foros , Arne Brataas , Gerrit E. W. Bauer , Yaroslav Tserkovnyak

Effects of an incoming spin-polarized current on a magnetic moment are explored. We found that the spin torque occurs only when the incoming spin changes as a function of time inside of the magnetic film. This implies that some…

Materials Science · Physics 2007-05-23 Wonkee Kim , F. Marsiglio

We propose a general design of a metallic double-nanowire structure which may support an equilibrium dissipationless electric current in the presence of magnetic field. The structure consists of a compact wire element of a specific shape,…

Mesoscale and Nanoscale Physics · Physics 2013-05-16 M. N. Chernodub

The prospect of combining the dissipationless nature of superconducting currents with the spin-polarization of magnetic materials is interesting with respect to exploring superconducting analogues of topics in spintronics. In order to…

Mesoscale and Nanoscale Physics · Physics 2015-06-22 Iryna Kulagina , Jacob Linder

In 1996, Berger and Slonczewski independently predicted that a large enough spin-polarized dc current density sent perpendicularly through a ferromagnetic layer could produce magnetic excitations (spin-waves) or reversal of magnetization…

Materials Science · Physics 2009-11-10 J. Bass , S. Urazhdin , Norman O. Birge , W. P. Pratt

The time dependent Schrodinger equation inclusive of curvature effects is developed for a spinless electron constrained to motion on a toroidal surface and subjected to circularly polarized and linearly polarized waves in the microwave…

Classical Physics · Physics 2007-05-23 M. Encinosa , M. Jack

The magnetization switching of a thin ferromagnetic layer placed on top of a heavy metal (such as Pt, Ta or W) driven by an in-plane current has been observed in recent experiments. The magnetization dynamics of these processes is studied…

Materials Science · Physics 2015-06-16 G. Finocchio , M. Carpentieri , E. Martinez , B. Azzerboni

The mode dependence of current-induced magnetic excitations in spin valves is studied theoretically. The torque exerted on the magnetization by transverse spin currents as well as the Gilbert damping constant are found to depend strongly on…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Arne Brataas , Yaroslav Tserkovnyak , Gerrit E. W. Bauer

In metals with finite magnetization $\vec{M}$, experiment shows that transverse polarized dc spin currents $\vec{J}_{i}$ both decay and precess on crossing a finite sample thickness. The present work uses Onsager's irreversible…

Mesoscale and Nanoscale Physics · Physics 2025-09-03 Chen Sun , Wayne M. Saslow

Recent studies have predicted extraordinary properties for transverse domain walls in cylindrical nanowires: zero depinning current, the absence of the Walker breakdown, and applications as domain wall oscillators. In order to reliably…

A one dimensional theory of lateral spin-polarized transport is derived from the two dimensional flow in the vertical cross section of a stack of ferromagnetic and paramagnetic layers. This takes into account the influence of the lead on…

Materials Science · Physics 2008-02-20 H. Dery , L. Cywinski , L. J. Sham

We study the switching-process of the magnetization in a ferromagnetic-normal-metal multilayer system by a spin polarized electrical current via the spin transfer torque. We use a spin drift-diffusion equation (SDDE) and the…

Mesoscale and Nanoscale Physics · Physics 2013-01-16 M. Wenin , A. Windisch , W. Poetz

In systems with time-reversal symmetry, the orbital magnetization is zero in equilibrium. Recently, it has been proposed that the orbital magnetization can be induced by an electric current in a helical crystal structure in the same manner…

Materials Science · Physics 2020-11-23 D. Hara , M. S. Bahramy , S. Murakami
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