Magnetostrictive effect in single crystal Fe_(1-x)Ga_x thin films

摘要

The magnetic properties of single crystal Fe_(1-x)Ga_x thin films deposited on ZnSe/GaAs(001) and MgO(001) substrates by molecular beam epitaxy were investigated by vibrating sample magnetometry and angle dependent ferromagnetic resonance. Depositions on the ZnSe buffer layer feature a strong uniaxial anisotropy that scales with the thin film magnetostriction of the samples, while depositions on MgO(001) substrates result in a purely cubic anisotropy whose cubic anisotropy constant, K_1 switches sign at a lower Ga concentration than is seen in bulk.