Magnetostriction in ferromagnetic CdCr₂Se₄

The magnetostriction constants λ100 and λ111 of CdCr2Se4 have been measured using a ferromagnetic resonance technique. At 4.2°K the results are: λ100 = +2.6×10-6 and λ111 = -28×10-6. The dominant λ111 is of single-ion origin, and its magnetization dependence is described very well by the single-ion theory of Callen and Callen. A ferromagnetic resonance linewidth of 15 Oe and anisotropy constant K1 of 3.5×103 erg/cc have been determined at 4.2°K. The Curie temperature, determined by an initial permeability method, was 129°±2°K. © 1967 The American Institute of Physics.