Experimental evidence for a Mott-Wigner glass phase of magnetite above the Verwey temperature

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.210· OSTI ID:6460586

Boekema, C; Lichti, R L; Chan, K C.B.; Brabers, V A.M.; Denison, A B; Cooke, D W; Heffner, R H; Hutson, R L; Schillaci, M E

New muon-spin-relaxation (..mu..SR) results on magnetite are reported and discussed in light of earlier Moessbauer, neutron, and ..mu..SR results. Modification of the ..mu..SR anomaly (observed at 247 K in zero field), when an external magnetic field is applied, provides evidence that the anomaly results from cross relaxation between the muon Larmor precession and the electron-correlation process in the B sublattice. The combined results strongly indicate that phonon-assisted electron hopping is the principal conduction mechanism above the Verwey transition temperature (T/sub V/). Together with theoretical evidence, these data support Mott's suggestion that above T/sub V/ magnetite is in the Wigner-glass state.

• Research Organization: Texas Tech University, Lubbock, Texas 79409
• OSTI ID: 6460586
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANGULAR MOMENTUM
CHALCOGENIDES
COHERENT SCATTERING
CORRELATIONS
DIFFRACTION
ELECTRON CORRELATION
ELECTRON SPIN RESONANCE
ELECTRON-PHONON COUPLING
GLASS
IRON COMPOUNDS
IRON ORES
IRON OXIDES
MAGNETIC FIELDS
MAGNETIC RESONANCE
MAGNETITE
MINERALS
MOESSBAUER EFFECT
MUON PROBES
NEUTRON DIFFRACTION
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHASE TRANSFORMATIONS
POLARONS
PROBES
QUASI PARTICLES
RELAXATION
RESONANCE
SCATTERING
SPIN
TRANSITION ELEMENT COMPOUNDS