ChemInform Abstract: Hydrogen-Induced Phase Transitions of GdZn1-xMgx Compounds.
Abstract
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ChemInform Abstract
The pseudo-binary title compounds have a CsCl-like structure and exhibit ferromagnetic behavior with Curie temperatures between 117 K (x = 1) and 268 K (x = 0). GdZn1-xMgx have a max. hydrogen uptake of about 2 H atoms per formula unit. The fully hydrided compounds GdZn1-xMgxH≈2 are paramagnetic above 5 K and their XRD patterns are similar to those of GdH2 (CaF2-type). By reducing the hydrogen content (desorption) a ferromagnetic hydride phase with a Curie temp. of about 50 K is obtained for the Zn-rich compounds. The original Zn-rich compounds can be restored by complete hydrogen desorption, whereas GdMg can not be reformed due to evaporation of Mg.
