Electronic and structural studies of the hydrides of ErFe/sub 2/ from /sup 57/Fe and /sup 166/Er Moessbauer spectroscopy

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6511932

Viccaro, P J; Shenoy, G K; Dunlap, B D; Westlake, D G; Miller, J F

Two different hydrides of the C15 Laves phase intermetallic ErFe/sub 2/ are considered. For ErFe/sub 2/ H/sub 3/./sub 65/, x-ray analyses showed the presence of an expanded C15 cubic phase and lower symmetry phase. The /sup 57/Fe mean saturated hyperfine field is 20% larger than in ErFe/sub 2/ and the /sup 166/Er hyperfine field is 15% smaller. These results coupled with previous measurements of the net moment imply that the Er--Fe coupling is not antiparallel in this hydride. For ErFe/sub 2/ H/sub 4/./sub 12/, only a structural phase consistent with trigonal lattice was detected. The Moessbauer results indicate a magnetic transition temperature between 1.7 K and 4.2 K and a drastic reduction of the Fe moment in this hydride.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6511932
• Report Number(s): CONF-780868-3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
COHERENT SCATTERING
DIFFRACTION
ELECTRONIC STRUCTURE
ERBIUM 166
ERBIUM ALLOYS
ERBIUM ISOTOPES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
GAMMA SPECTROMETERS
HYPERFINE STRUCTURE
INTERMEDIATE MASS NUCLEI
INTERMETALLIC COMPOUNDS
IRON 57
IRON ALLOYS
IRON BASE ALLOYS
IRON ISOTOPES
ISOTOPES
LAVES PHASES
MEASURING INSTRUMENTS
MOESSBAUER SPECTROMETERS
NUCLEI
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SCATTERING
SPECTROMETERS
STABLE ISOTOPES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
X-RAY DIFFRACTION