Electron paramagnetic resonance of Pu[sup 3+] and Cf[sup 3+] in single crystals of LuPO[sub 4]

Journal Article · Mon Feb 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.3412· OSTI ID:7123514

Kot, W K; Edelstein, N M ^[1]; Abraham, M M; Boatner, L A ^[2]

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1. Chemical Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States)
2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6056 (United States)

Electron-paramagnetic-resonance (EPR) spectroscopy has been used to investigate the ground-state properties of the actinide ions Pu[sup 3+] (5[ital f][sup 5]) and Cf[sup 3+] (5[ital f][sup 9]) incorporated as dilute impurities in single crystals of the tetragonal-symmetry host LuPO[sub 4]. The [ital g] values of the electronic ground states were determined experimentally at a sample temperature of 4 K. These values are compared to those calculated using the free-ion parameters available from previous crystal-field analyses of Pu[sup 3+] and Cf[sup 3+] ions diluted in LaCl[sub 3]-host single crystals and a set of crystal-field parameters reported earlier for Cm[sup 3+] (5[ital f][sup 7]) ions in LuPO[sub 4]. These crystal-field parameters were obtained from spin-Hamiltonian parameters using operator-equivalent factors and the assumption that the zero-field splitting of the ground state of the 5[ital f][sup 7] ion is due primarily to intermediate-coupling effects. The relatively poor agreement between the experimental and calculated [ital g] values indicates that the crystal-field parameters obtained for Cm[sup 3+] in LuPO[sub 4] cannot be used to predict the correct electronic ground-state properties of the other actinide ions Pu[sup 3+] and Cf[sup 3+] in the identical host single-crystal LuPO[sub 4]. Accordingly, in the case of actinide impurity ions in single crystals, there is no simple correspondence between the spin-Hamiltonian parameters and the crystal-field parameters.

• DOE Contract Number: AC05-84OR21400; AC03-76SF00098
• OSTI ID: 7123514
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:6; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CALIFORNIUM IONS
CHARGED PARTICLES
CRYSTAL FIELD
CRYSTALS
ELECTRON SPIN RESONANCE
ELECTRONIC STRUCTURE
ENERGY LEVELS
GROUND STATES
IONS
LANDE FACTOR
LUTETIUM COMPOUNDS
LUTETIUM PHOSPHATES
MAGNETIC RESONANCE
MONOCRYSTALS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PLUTONIUM IONS
RARE EARTH COMPOUNDS
RESONANCE