Macrospin model to explain the absence of preswitching oscillations in magnetic tunnel junctions: Fieldlike spin-transfer torque

被引：5
|
作者：
Garzon, Samir [1 ,4 ]
Bazaliy, Yaroslaw [1 ,2 ,4 ]
Webb, Richard A. [1 ,4 ]
Covington, Mark [3 ]
Kaka, Shehzaad [3 ]
Crawford, Thomas M. [1 ,4 ]
机构：
[1] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA
[2] Natl Acad Sci, Inst Magnetism, UA-03142 Kiev, Ukraine
[3] Seagate Res, Pittsburgh, PA 15222 USA
[4] Univ S Carolina, USC Nanoctr, Columbia, SC 29208 USA
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 10期
关键词：
magnetic switching; magnetic tunnelling; magnetisation reversal; spin valves; DRIVEN; DYNAMICS;
D O I：
10.1103/PhysRevB.79.100402
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We show that the absence of preswitching oscillations ("incubation delay") in magnetic tunnel junctions can be explained within the macrospin model by a sizable fieldlike component of the spin-transfer torque. It is further suggested that measurements of the voltage dependence of tunnel junction switching time in the presence of external easy axis magnetic fields can be used to determine the magnitude and voltage dependence of the fieldlike torque.
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页数：4
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