Reversal Mode Instability And Magnetoresistance In Perpendicular (Co/Pd)/Cu/(Co/Ni) Pseudo-Spin-Valves
APPLIED PHYSICS LETTERS(2013)
摘要
We have observed distinct temperature-dependent magnetization reversal modes in a perpendicular (Co/Pd)(4)/Co/Cu/(Co/Ni)(4)/Co pseudo-spin-valve, which are correlated with spin-transport properties. At 300 K, magnetization reversal occurs by vertically correlated domains. Below 200 K the hysteresis loop becomes bifurcated due to laterally correlated reversal of the individual stacks. The magnetic configuration change also leads to higher spin disorders and a significant increase in the giant magnetoresistance effect. First order reversal curve measurements reveal that the coupled state can be re-established through field cycling and allow direct determination of the interlayer coupling strength as a function of temperature. (C) 2013 AIP Publishing LLC.
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