What is the mechanism of hydrogen absorption in rare-earth intermetallics
Journal Article
·
· J. Appl. Phys.; (United States)
We have studied the intermetallic compounds EuPd and EuRh/sub 2/, and the corresponding saturated hydrides, via Eu Moessbauer spectroscopy, magnetic measurements, and x-ray diffraction. In both intermetallics, the Moessbauer parameters, indicative of the environment about the Eu ion, change substantially in the hydriding process and approach those of EuH/sub 2/. We interpret those changes as evidence that the hydrogen absorption occurs via the formation of EuH/sub 2/ ''complexes''. For the EuRh/sub 2/, a simple thermodynamic argument supports this approach. The EuRh/sub 2/ maintains the same crystal structure under H/sub 2/ absorption, but the Eu/sup 3 +/ becomes Eu/sup 2 +/, and the lattice volume increases by 40%. EuPd changes structure under H/sub 2/ absorption, but the Eu remains divalent. Results of magnetic and crystallographic measurements are presented. With partial hydriding, only the pure intermetallic and saturated hydride phases are observed to occur.
- Research Organization:
- Bell Laboratories, Murray Hill, New Jersey 07974
- OSTI ID:
- 5365250
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 48:12; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
Similar Records
FERROMAGNETISM IN EuH$sub 2$
Moessbauer effect investigations of the electronic and magnetic properties of rare earth metal and intermetallic hydrides
Moessbauer effect investigations of the electronic and magnetic properties of rare earth metal and intermetallic hydrides
Journal Article
·
Sat Apr 14 23:00:00 EST 1962
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
·
OSTI ID:4832007
Moessbauer effect investigations of the electronic and magnetic properties of rare earth metal and intermetallic hydrides
Conference
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Sun Dec 31 23:00:00 EST 1978
·
OSTI ID:5978303
Moessbauer effect investigations of the electronic and magnetic properties of rare earth metal and intermetallic hydrides
Journal Article
·
Wed Oct 31 23:00:00 EST 1979
· J. Appl. Phys.; (United States)
·
OSTI ID:5740841
Related Subjects
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ADSORPTION
ALLOYS
COHERENT SCATTERING
CRYOGENIC FLUIDS
DIFFRACTION
ELEMENTS
EUROPIUM ALLOYS
FLUIDS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
INTERMETALLIC COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MOESSBAUER EFFECT
NONMETALS
PALLADIUM ALLOYS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
RARE EARTH ALLOYS
RHODIUM ALLOYS
RHODIUM BASE ALLOYS
SCATTERING
SORPTION
SORPTIVE PROPERTIES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
X-RAY DIFFRACTION
360102* -- Metals & Alloys-- Structure & Phase Studies
ADSORPTION
ALLOYS
COHERENT SCATTERING
CRYOGENIC FLUIDS
DIFFRACTION
ELEMENTS
EUROPIUM ALLOYS
FLUIDS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
INTERMETALLIC COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MOESSBAUER EFFECT
NONMETALS
PALLADIUM ALLOYS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
RARE EARTH ALLOYS
RHODIUM ALLOYS
RHODIUM BASE ALLOYS
SCATTERING
SORPTION
SORPTIVE PROPERTIES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
X-RAY DIFFRACTION