Effects of Antiferromagnetic Spin Rotation on Anisotropy of Ferromagnetic/Antiferromagnetic Bilayers

Abstract

In epitaxial (111) oriented Ni${}_{80}$Fe${}_{20}$/Fe${}_{50}$Mn${}_{50}$ bilayers, we separate two distinct behaviors: unidirectional anisotropy (exchange bias) in thick Fe${}_{50}$Mn${}_{50}$, and enhanced coercivity in thin Fe${}_{50}$Mn${}_{50}$. By measuring the magnetization response to a rotating magnetic field, we quantitatively determine the relevant anisotropies, and demonstrate that the enhanced coercivity is related to the rotatable magnetic anisotropy of Fe${}_{50}$Mn${}_{50}$. We also demonstrate the consequences of the anisotropy changes with temperature.

arXiv comment4 pages, 4 figures

Cited by in corpus (6)

• Exchange bias effect of ferro-/antiferromagnetic heterostructures
• Rotational hysteresis of the exchange anisotropy direction in Co/FeMn thin films
• Dynamics of Spontaneous Magnetization Reversal in Exchange Biased Heterostructures
• Cooperative Multiscale Aging in a Ferromagnet/Antiferromagnet Bilayer
• Magnetic freezing transition in a CoO/Permalloy bilayer revealed by transverse ac susceptibility
• Nearly ideal memristive functionality based on viscous magnetization dynamics