Magneto-optical study of magnetization reversal asymmetry in exchange bias
A. Tillmanns (1), S. Oertker (1), B. Beschoten (1), G. G\"untherodt, (1), C. Leighton (2), Ivan K. Schuller (2), and J. Nogues (3) ((1)II., Physikalisches Institut, RWTH Aachen, Germany, (2) Department of Physics,, University of California, (3) Departament de Fisica
TL;DR
This study investigates the asymmetric magnetization reversal in exchange biased Fe/MnF₂ using magneto-optical Kerr effect, revealing conditions for observing magnetization components and how reversal asymmetry varies with field angles.
Contribution
It provides experimentally tested analytical conditions for observing magnetization components and explores the angle-dependent reversal asymmetry in exchange bias systems.
Findings
Identification of conditions for observing magnetization components
Reversal asymmetry depends on the angle between cooling and measurement fields
Magnetization reversal involves coherent rotation into a perpendicular state
Abstract
The asymmetric magnetization reversal in exchange biased Fe/MnF involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here experimentally tested analytical conditions for the unambiguous observation of both longitudinal and transverse magnetization components using the magneto-optical Kerr effect. This provides a fast and powerful probe of coherent magnetization reversal as well as its chirality. Surprisingly, the sign and asymmetry of the transverse magnetization component of Fe/MnF change with the angle between cooling and measurement fields.
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