Spin glass transition in a thin-film NiO/permalloy bilayer
Spin glass transition in a thin-film NiO/permalloy bilayer
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 …