Effect of Heat Treatment on the Phase Composition and Magnetic Properties of Single-Layer Nanostructures (ni₈₀fe₂₀)_0,6mn_0,4

摘要

The influence of heat treatment on the phase composition and magnetic properties of single-layer Ni-Fe-Mn films are investigated. Samples of (Ni80Fe20)60Mn40(50nm)/Ta (5nm) were prepared by direct current magnetron sputtering on glass substrates. It is shown that annealing leads to a phase separation of the fcc solid solution of Ni-Fe-Mn on permalloy and manganese. In annealed samples, when the sample is cooled in a magnetic field, unidirectional anisotropy is formed due to the exchange interaction of the ferromagnetic regions of Ni80Fe20 and the antiferromagnetic regions of Mn. The exchange bias of the magnetic hysteresis loop is Hex = 317 Oe.