Crystal-field excitations and magnetic properties of TmPO[sub 4]

Journal Article · Mon Mar 01 00:00:00 EST 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.465028· OSTI ID:6771548

Loong, C; Soderholm, L ^[1]; Abraham, M M; Boatner, L A ^[2]; Edelstein, N M ^[3]

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1. Intense Pulsed Neutron Source and Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439-4814 (United States)
2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
3. Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)

The magnetic-excitation spectrum of TmPO[sub 4] has been studied using inelastic neutron scattering techniques. Sharp crystal-field transitions were observed in spectra obtained at 15 and 100 K, yielding new information regarding the energy-level structure of the Tm[sup 3+] ground-multiplet splitting. The data were analyzed using a Hamiltonian that included the atomic free-ion and crystal-field interactions for an [ital f][sup 12] configuration. Using the Tm free-ion parameters derived from optical spectroscopy of Tm[sup 3+] diluted in a LuPO[sub 4] host, a set of crystal-field parameters were obtained for Tm[sup 3+] in pure TmPO[sub 4]. The calculated magnetic spectra of TmPO[sub 4] agree very well with the results of neutron and Raman measurements. The calculated bulk magnetic susceptibility of TmPO[sub 4] exhibits a large anisotropy at low temperature and is in good agreement with the experimental data. A significant contribution to the specific heat from the Tm[sup 3+] crystal-field states was found at temperatures below 100 K.

• DOE Contract Number: W-31-109-ENG-38; AC05-84OR21400; AC03-76SF00098
• OSTI ID: 6771548
• Journal Information: Journal of Chemical Physics; (United States), Vol. 98:5; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
THULIUM IONS
ENERGY LEVELS
THULIUM PHOSPHATES
CRYSTAL FIELD
MAGNETIC PROPERTIES
GROUND STATES
HAMILTONIANS
INELASTIC SCATTERING
MAGNETIC SUSCEPTIBILITY
MULTIPLETS
NEUTRON DIFFRACTION
SPECIFIC HEAT
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
CHARGED PARTICLES
COHERENT SCATTERING
DIFFRACTION
IONS
MATHEMATICAL OPERATORS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
QUANTUM OPERATORS
RARE EARTH COMPOUNDS
SCATTERING
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
THULIUM COMPOUNDS
360606* - Other Materials- Physical Properties- (1992-)