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Spin Dynamics in Magnetic Heterostructures Driven by Current-Induced Spin-Orbit Torques

100%

Kulagin N., Korneev V., Popkov A., Demin G.

In this work it is shown that in magnetic heterostructure with the structural inversion symmetry due to the presence of the Rashba effective field responsible for the effects of spin-orbit scattering, the spin dynamics in the magnetic layer is described by a modified system of coupled equations for the exchange-coupled localized spins and spin accumulation. As a result, this system is reduced to an effective Landau-Lifshitz equation for the total magnetization with the additional torques which act similarly to the spin transfer torque in magnetic tunnel junction. Based on these equations, we calculated numerically the field dependences of the switching current density for the different magnetization geometries, in particular for that was used in work of Miron et al., which are in a good agreement with the experimental results for the reasonable fitting parameters.

Structural Transformations and Magnetic Changes in Multiferroic BiFeO₃ under External Electric Field

88%

Soloviov S., Popkov A., Kulagin N., Sukmanova K., Zvezdin A.

Acta Physica Polonica A

2015

vol. 127

issue 2

245-247

The influence of electric field on the structure parameters and magnetic states in BiFeO₃ multiferroic is studied using the Landau theory of phase transitions taking into account experimental data and results of ab initio calculations. Main features of structure transitions near critical electric fields and a concomitant rearrangementof the magnetic structure are discussed.

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2 Acta Physica Polonica A

2 2015

2 Kulagin N.

2 Popkov A.

1 Demin G.

1 Korneev V.

1 Soloviov S.

1 Sukmanova K.

1 Zvezdin A.

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Spin Dynamics in Magnetic Heterostructures Driven by Current-Induced Spin-Orbit Torques

Structural Transformations and Magnetic Changes in Multiferroic BiFeO₃ under External Electric Field