Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction

doi:10.1088/1674-1056/27/6/067501

Abstract We investigate magnetization reversal of two-body uniaxial Stoner particles, by injecting spin-polarized current through a spin-valve structure. The two-body Stoner particles perform synchronized dynamics and can act as an information bit in computer technology. In the presence of magnetic dipole-dipole interaction (DDI) between the two particles, the critical switching current I_c for reversing the two dipoles is analytically obtained and numerically verified in two typical geometric configurations. The I_c bifurcates at a critical DDI strength, where I_c can decrease to about 70% of the usual value without DDI. Moreover, we also numerically investigate the magnetic hysteresis loop, magnetization self-precession, reversal time and synchronization stability phase diagram for the two-body system in the synchronized dynamics regime.

Keywords: magnetization reversal spin-polarized current Stoner particle

Received: 25 January 2018
Revised: 04 April 2018
Accepted manuscript online:

PACS:	75.60.Jk	(Magnetization reversal mechanisms)
	75.75.-c	(Magnetic properties of nanostructures)
	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

Fund: Project supported by the National Natural Science Foundation of China (Grant No.11274236) and the Deutsche Forschungsgemeinschaft via SFB 689.

Corresponding Authors: Zhou-Zhou Sun
E-mail: phzzsun@suda.edu.cn

Cite this article:

Zhou-Zhou Sun(孙周洲), Yu Yang(杨玉), J Schliemann Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction 2018 Chin. Phys. B 27 067501

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Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction

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