A MOSSBAUER STUDY OF Fe$sup 57$ IN DISTORTING SPINELS

Journal Article · Mon Jul 01 00:00:00 EDT 1963 · J. Phys. Soc. Japan

DOI:https://doi.org/10.1143/JPSJ.18.1089· OSTI ID:4657912

Tanaka, M; Mizoguchi, T; Aiyama, Y

The effect of cooperative John-Teller distortion on Mossbauer absorption spectra in the paramagnetic state of germanium-substituted copper ferrite was measured. The measurements at 430 and 510 deg C show almost the same spectra consisting of two absorption lines with isomer shifts of 0.17 and 0.11 mm/sec, and quadrupole splittings of 0.50 and 0.50 mm/sec, respectively. No appreciable change of the quadrupole splitting is present in a cubic phase and in a tetragonal phase. In the ferromagnetic state, directions of spins are uniform in a domain, but those of the electric field gradients at Fe/sup 57/ nuclei on octahedral sites take four equivalent (111) directions in a unit cell, and so the angular part of the quadrupole interaction is not unique. (C.E.S.)

• Research Organization: Tokyo Univ.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-033925
• OSTI ID: 4657912
• Journal Information: J. Phys. Soc. Japan, Journal Name: J. Phys. Soc. Japan Vol. Vol: 18
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ALUMINUM OXIDES
ATOMIC MODELS
CHEMISTRY
CONFIGURATION
COPPER OXIDES
CRYSTALS
DIPOLES
ELECTRIC MOMENTS
GAMMA RADIATION
GERMANIUM OXIDES
INTERACTIONS
IRON 57
IRON OXIDES
LATTICES
MAGNESIUM OXIDES
MAGNETISM
MATHEMATICS
MEASURED VALUES
MINERALS
MOESSBAUER EFFECT
NUCLEI
OXIDES
PARAMAGNETISM
PHASE DIAGRAMS
RESONANCE
SPECTRA
SPECTRAL SHIFT
SPECTROSCOPY
SPIN
SPINELS
TEMPERATURE
VARIATIONS