Study of magnetostrictive deformation of Fe–Si by X-rays

Abstract

Tilt of lattice planes on a 90° wall between adjacent magnetic domains was measured using a double‐crystal diffractometer in a nearly parallel setting. Both reflection curves and transmission topographs were evaluated. The results are in agreement with the model in which a 90° wall is considered as a twin boundary in a slightly tetragonal lattice of a cubic crystal deformed by magnetostriction. The experiments present a new method for the measurement of the magnetostrictive constant.

X-ray topographic observation of magnetic domain structures induced by stresses

“…Contrast on the 90 • walls was calculated using the dynamical theory of X-ray diffraction and good agreement with the experiments was found (Polcarová & Brádler 1982). If a sufficiently sensitive experimental setting is applied, the tilt of the diffracting planes at the wall can be measured directly (Brádler & Polcarová 1972). Images of wall junctions and other more complicated structures were successfully simulated (Kléman et al .…”