Elastic anisotropy of an Fe79 Si12 B9 amorphous alloy thin film studied by ultrasound spectroscopy

A complete set of elastic constants Cij of an Fe79 Si12 B9 amorphous alloy free standing thin film has been determined by using ultrasound spectroscopy techniques. The out-of-plane shear moduli of C44 and C55 are measured by the thickness resonance frequencies and are almost elastic isotropic in the film plane indicating that the thin film has a hexagonal-type elastic symmetry. The remaining Cij in the symmetry are determined by the modified resonance ultrasound spectroscopy coupled with a laser-Doppler interferometory. Inverse calculation showed elastic anisotropies between the in-plane and the out-of-plane directions; C33 / C11 =1.21 and C66 / C44 =1.26. Magnetic property measurements also revealed the remarkable magnetization difference between the two directions suggesting that the structural difference between the in-plane and the out-of-plane directions would be responsible for them. © 2007 American Institute of Physics.Tarumi R., Shibata A., Ogi H., et al. "Elastic anisotropy of an Fe79 Si12 B9 amorphous alloy thin film studied by ultrasound spectroscopy" Journal of Applied Physics, 101(5), 053519 (2007) https://doi.org/10.1063/1.2538167