Magnetic properties of the hydrides of selected rare-earth intermetallic compounds with transition metals

Conference · Thu Jan 01 04:00:00 EST 1976 · AIP (Am. Inst. Phys.) Conf. Proc.; (United States)

OSTI ID:7317763

Gualtieri, D M; Narasimhan, K S.V.L.; Wallace, W E

ErFe/sub 2/, TmFe/sub 2/ and HoFe/sub 2/ have been found to form stable hydrides of composition ErFe/sub 2/H/sub 3/./sub 9/, TmFe/sub 2/H/sub 4/./sub 3/, and HoFe/sub 2/H/sub 4/./sub 47/ when exposed to hydrogen at 3.6 x 10/sup 6/ Pa at room temperature. X-ray diffraction reveals an expansion of the ErFe/sub 2/ lattice parameter from 7.282 +- 0.001 to 7.828 +- 0.001 A, the expansion of the TmFe/sub 2/ lattice parameter from 7.238 +- 0.001 to 7.839 +- 0.001 A, and the expansion of the HoFe/sub 2/ lattice parameter from 7.284 +- 0.001 to 7.880 +- 0.001 A with hydrogen absorption. Magnetization measurements as a function of temperature and field were made on these hydrides. The compensation temperature observed at 480/sup 0/K for ErFe/sub 2/ and 233/sup 0/K for TmFe/sub 2/ was shifted to 42/sup 0/K and 8/sup 0/K, respectively, upon hydriding. Magnetic moments measured at 4.2/sup 0/K in an applied field of 120 kOe are 6.45 and 5.60 ..mu../sub B/FU for TmBe/sub 2/ and HoFe/sub 2/, respectively. These large moments arise due to the reduction of the iron moment. Results on hydrides of NdCo/sub 5/ and DyCo/sub 5/./sub 2/ are also presented.

• Research Organization: Univ. of Pittsburgh
• OSTI ID: 7317763
• Conference Information: Journal Name: AIP (Am. Inst. Phys.) Conf. Proc.; (United States) Journal Volume: 34
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CHEMICAL REACTIONS
COBALT
COBALT COMPOUNDS
COBALT HYDRIDES
COHERENT SCATTERING
DIFFRACTION
DYSPROSIUM COMPOUNDS
DYSPROSIUM HYDRIDES
ELEMENTS
ERBIUM COMPOUNDS
ERBIUM HYDRIDES
EXPANSION
HOLMIUM COMPOUNDS
HOLMIUM HYDRIDES
HYDRIDATION
HYDRIDES
HYDROGEN COMPOUNDS
IRON COMPOUNDS
IRON HYDRIDES
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIZATION
METALS
NEODYMIUM COMPOUNDS
NEODYMIUM HYDRIDES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
THULIUM COMPOUNDS
THULIUM HYDRIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY DIFFRACTION