Magnetic susceptibility of californium fluorides

Journal Article · Tue May 01 04:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.9045· OSTI ID:7153872

Chang, C P ^[1]; Haire, R G ^[2]; Nave, S E ^[1]

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1. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996-1200 (USA)
2. Transuranium Research Laboratory (Chemistry Division), Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6375 (USA)

Results of magnetic measurements are presented for polycrystalline samples of CfF{sub 3} (both the hexagonal-LaF{sub 3}-type and orthorhombic-YF{sub 3}-type crystal structures) and CfF{sub 4} (monoclinic-UF{sub 4}-type). Measurements were performed at temperatures between 4.2 and 340 K and in magnetic fields of up to 50 kG. The effective paramagnetic moments, {mu}{sub eff}, and the Weiss constants, {ital FTHETA}{sub {ital P}}, have been determined in the Curie-Weiss temperature region (150--340 K). In the trifluorides no significant differences in {mu}{sub {ital e}{ital f}{ital f}} and {ital FTHETA}{sub {ital P}} were observed as a function of crystal structure or sample age (radiation damage). For the tetrafluoride, two distinct sets of values for {mu}{sub {ital e}{ital f}{ital f}} and {ital FTHETA}{sub {ital P}} were obtained depending on the sample age. Antiferromagnetic ordering was observed in both Cf compounds at temperatures below 12 K. Crystal-field effects were evident in the temperature range between about 12 and 150 K. The calculated susceptibilities for these compounds are presented and discussed.

• OSTI ID: 7153872
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:13; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ACTINIDE COMPOUNDS
ANTIFERROMAGNETISM
CALIFORNIUM COMPOUNDS
CALIFORNIUM FLUORIDES
CRYSTAL FIELD
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MEDIUM TEMPERATURE
PARAMAGNETISM
PHYSICAL PROPERTIES
TEMPERATURE DEPENDENCE
TRANSPLUTONIUM COMPOUNDS
TRANSURANIUM COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE