Long-wavelength static atomic displacements in γ-FeNi alloys

Ferromagnetic and Spin-Wave Resonance in Fe_xNi_1-X (0<x<1) Films

“…The chemical composition of Fe 1-х Ni х invar structure at which the structural face-centered cubic → body-centered cubic (fcc→bcc) shear-type transformation occurs at room temperature is characterized by inequality 0.32<x<0.4. Therefore the features of invar alloy properties are also related to the state of alloys preceding the martensite state [2]. It should be noted that there is no united point of view about the ground state of massive invar alloys so far [1].…”