Non-monotonic angular magnetoresistance in asymmetric spin valves
Jan Manschot, Arne Brataas, Gerrit E. W. Bauer
TL;DR
This paper reveals that the resistance in asymmetric spin valves can vary non-monotonically with the angle between magnetizations, challenging previous assumptions and identifying conditions for observing this behavior experimentally.
Contribution
It demonstrates the non-monotonic angular dependence of magnetoresistance in asymmetric spin valves and specifies the parameter conditions for experimental detection.
Findings
Resistance is not necessarily monotonic with angle.
Global resistance minimum can occur at finite angles.
Conditions for experimental observation are identified.
Abstract
The electric resistance of ferromagnet/normal-metal/ferromagnet perpendicular spin valves depends on the relative angle between the magnetization directions. In contrast to common wisdom, this angular magnetoresistance is found to be not necessarily a monotone function of the angle. The parameter dependence of the global resistance minimum at finite angles is studied and the conditions for experimental observation are specified.
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