Pressure dependence of the electronic and magnetic properties of the layered antiferromagnetic insultaor FeI[sub 2]
- School of Physics and Astronomy, Tel-Aviv University, Ramat-Aviv 69978, Tel-Aviv (Israel)
- Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Nuclear hyperfine interaction parameters have been deduced from [sup 57]Fe Moessbauer spectra recorded in the range of 0--26 GPa and at temperatures of 10--296 K in anhydrous ferrous iodide. X-ray diffraction data indicate that the compound is isostructral in the range 0--25 GPa. There is an abrupt change in the electronic state and spin dynamics of the transition-metal ([ital TM]) atom, and in the magnetic behavior of the compound at 20 GPa. In the range 0--19 GPa, antiferromagnetic ordering occurs below well-defined Neel temperatures T[sub N]. T[sub N] increases by more than ten-fold and static internal fields of up to 12 Tesla are generated at the [ital TM] nuclear site. At pressures higher than 20 GPa hyperfine structure associated with atomic-spin fluctuations are evident down to 10 K. An enhanced dynamic internal field of [similar to]30 Tesla --- associated with the spin fluctuations --- is sensed by the iron nucleus. No static magnetic ordering due to cooperative exchange interactions is observed above 20 GPa, in contrast to the magnetism that occurs in the low pressure regime. [copyright]American Institute of Phyiscs
- OSTI ID:
- 7017019
- Report Number(s):
- CONF-921145-; CODEN: APCPCS
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 309:1; Conference: Production and neutralization of negative ions and beams, Upton, NY (United States), 9-13 Nov 1992; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IRON IODIDES
MAGNETIC PROPERTIES
ANTIFERROMAGNETIC MATERIALS
CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
MOESSBAUER EFFECT
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
VERY HIGH PRESSURE
HALIDES
HALOGEN COMPOUNDS
IODIDES
IODINE COMPOUNDS
IRON COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
PHYSICAL PROPERTIES
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
360606* - Other Materials- Physical Properties- (1992-)