Heterogeneous magnetic state in hydrogen-amorphized GdFe2

Hydrogen-amorphized GdFe2Hx were prepared for two different compositions of parent alloy and different hydrogenation temperature. The average hyperfin e field grows from 22.5 T for the initial compound up to 33.4 T for the amo rphized hydride. Samples amorphized at different temperatures show the same hyperfine field, whereas magnetic moment, compensation temperature and Cur ie temperature decrease with increasing the hydrogenation temperature. The non-Brillouin behavior of temperature dependence of magnetic moment of Gd s ublattice and anomalous high-field magnetization curves were found in amorp hous hydrides. The obtained results were interpreted in the assumption of h eterogeneous structural state. (C) 1999 Elsevier Science B.V. All rights re served.