Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21151
Title: Micromagnetic simulation of critical current density of spin transfer torque switching in a full-Heusler Co2FeAl0.5Si0.5 alloy spin valve nanopillar
Authors: Huang, HB
Ma, XQ
Liu, ZH
Meng, FY
Shi, SQ 
Chen, LQ
Keywords: Micromagnetic simulation
Critical current density
Spin transfer torque switching
Heusler alloy
Spin valve nanopillar
Issue Date: 2013
Publisher: Elsevier Science Bv
Source: Journal of Magnetism and Magnetic Materials, 2013, v. 330, p. 16-20 How to cite?
Journal: Journal of Magnetism and Magnetic Materials 
Abstract: We investigated the critical current density of spin transfer torque switching in a full-Heusler Co2FeAl0.5Si0.5 5 alloy spin-valve nanopillar through micromagnetic simulations. The simulations explain the experimental results on the resistance versus external magnetic field and yield good agreement with the measured switching behavior. It is shown that different magnitudes of current densities and directions of external magnetic fields give rise to a shift of resistance hysteretic loop and a variable range of switching. We demonstrated that three critical current densities have different slopes with Gilbert damping constant alpha and spin polarization constant eta, indicating that alpha and eta have different contributions to the critical current densities. Furthermore, we found that the area of resistance-current hysteretic loop decreases as the nanopillar size decreases. The domain structures indicated that the magnetization reversals have different switching processes between small and large sizes of pillars.
URI: http://hdl.handle.net/10397/21151
ISSN: 0304-8853
DOI: 10.1016/j.jmmm.2012.09.031
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