| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction |
| Zhou-Zhou Sun(孙周洲)1, Yu Yang(杨玉)1, J Schliemann2 |
1 College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China;
2 Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany |
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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 Ic for reversing the two dipoles is analytically obtained and numerically verified in two typical geometric configurations. The Ic bifurcates at a critical DDI strength, where Ic 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.
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Received: 25 January 2018
Revised: 04 April 2018
Accepted manuscript online:
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PACS:
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75.60.Jk
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(Magnetization reversal mechanisms)
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75.75.-c
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(Magnetic properties of nanostructures)
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85.75.-d
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(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
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| 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
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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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