Journal Article

Hydrogen ordering in rare-earth intermetallic (Er, Tb)Fe sub(2) compounds with giant spontaneous magnetostriction

Mushnikov, N V, Stashkova, LA, Terent'ev, P B, Gaviko, V S

2013

Overview

X-ray diffraction studies of rare-earth intermetallic Er sub(1 - x)Tb sub( x)Fe sub(2) compounds (with 0 less than or equal to x less than or equal to 0.6) and their hydrides were performed at room temperature. As the terbium content (x) in Er sub(1 - x)Tb sub(x)Fe sub(2) increases, the sign of the magnetostriction constant lambda sub(111) was shown to alternate from positive to negative. The lattice parameters, amount of incorporated hydrogen, and sizes of interstices were found to increase with increasing terbium content. The sizes of interstices accessible for occupation with hydrogen atoms were calculated for all alloys and their hydrides. Spontaneous anisotropic magnetostriction related to the rare-earth atoms was found to make no determining contribution to the resulting crystal lattice distortion caused by the incorporation of hydrogen atoms.

• Subject: Hydrides