Spin glass transition in a thin-film NiO/Permalloy bilayer

Abstract

We experimentally study magnetization aging in a thin-film NiO/Permalloy bilayer. Aging characteristics are nearly independent of temperature below the exchange bias blocking temperature, but rapidly vary above it. The dependence on the magnetic history qualitatively changes across this temperature. The observed behaviors are consistent with the spin glass transition at the exchange bias blocking temperature, with significant implications for magnetism and magnetoelectronic phenomena in antiferromagnet/ferromagnet bilayers.

5 pages, 4 figures

References in corpus (7)

• Skyrmion knots in frustrated magnets
• Long-distance spin transport in a disordered magnetic insulator
• Electrical Detection of Spin Backflow from an Antiferromagnetic Insulator/Y3Fe5O12 Interface
• Quantitative description of the azimuthal dependence of the exchange bias effect
• Prototypical topological orbital ferromagnet $\gamma$-FeMn
• Spin Orbit Torque in two dimensional Antiferromagnetic Topological Insulators
• Impact of Anisotropy on Antiferromagnet Rotation in Heusler-type Ferromagnet/Antiferromagnet Epitaxial Bilayers

Cited by in corpus (4)

• Experimental demonstration and analysis of random field effects in ferromagnet/antiferromagnet bilayers
• Magnetic freezing transition in a CoO/Permalloy bilayer revealed by transverse ac susceptibility
• Exchange bias without directional anisotropy in Permalloy/CoO bilayers
• Nearly ideal memristive functionality based on viscous magnetization dynamics