Abstract
We present a study of the temperature dependence of the switching fields in Co/Ni-based perpendicularly magnetized spin-valves. While magnetization reversal of all-perpendicular Co/Ni spin valves at ambient temperatures is typically marked by a single sharp step change in resistance, low temperature measurements can reveal a series of resistance steps, consistent with non-uniform magnetization configurations. We propose a model that consists of domain nucleation, propagation, and annihilation to explain the temperature dependence of the switching fields. Interestingly, low temperature (<30K) step changes in resistance that we associate with domain nucleation have a bimodal switching field and resistance step distribution, attributable to two competing nucleation pathways.
Original language | English (US) |
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Article number | 113910 |
Journal | Journal of Applied Physics |
Volume | 115 |
Issue number | 11 |
DOIs | |
State | Published - Mar 21 2014 |
ASJC Scopus subject areas
- Physics and Astronomy(all)