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Measurement of perpendicular spin torque at high bias via the pulsed switching phase diagram

Authors
Park, Seung-YoungJo, YounghunLee, Kyung-Jin
Issue Date
9-12월-2011
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.84, no.21
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW B
Volume
84
Number
21
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/110916
DOI
10.1103/PhysRevB.84.214417
ISSN
1098-0121
Abstract
We report an experimental method to estimate the bias dependence of the perpendicular spin torque in magnetic tunnel junctions. This method utilizes the pulse-width-dependent change in the switching phase diagram and addresses the perpendicular-torque-driven precessional switching at high-bias ranges where the in-plane spin torque acts as an additional damping. The bias dependence of the perpendicular spin torque at high bias was found to be linear for a voltage polarity. This method will be useful to address spin torque effects in magnetic tunnel junctions at high bias.
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