Nuclear Magnetic Resonance of Fe ⁵⁷ in Various Ferrimagnetic Oxides

Journal Article · Sun Apr 15 04:00:00 EST 1962 · Journal of the Physical Society of Japan

DOI:https://doi.org/10.1143/JPSJ.17.654· OSTI ID:4831087

Ogawa, Shizuko; Morimoto, Setsu

Enhanced nuclear magnetic resonance of Fe/sup 57/ in yttrium iron garnet, substituted iron garnets, magnetite, and hematite were observed. In garnets, two resonances for two positions of Fe/sup 3+/ were measured. Resonance frequencies in rare-earth-substituted iron garnets differ little from the resonance frequencies of Fe/sup 57/ in yttrium iron garnet. Comparing relatively accurate resonance frequencies observed in various garnets, it is seen that the effective magnetic field at the nucleus is proportionally increased with the crystal lattice parameters. The fractional variation of this field over all garnets is within 4% on both sites. The resonance of Fe/sup 57/ in magnetite is also enhanced by domain-wall excitation. Two resonance frequencies corresponding to octahedral and tetrahedral sites were observed at room temperature. Below the transition temperature, only one broad resonance was confirmed. A resonance of Fe/sup 57/ corresponding for Fe/sup 3+/ in hematite was observed in a sample containing a small amount of magnetite.

• Research Organization: Tokyo Univ.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-018481
• OSTI ID: 4831087
• Journal Information: Journal of the Physical Society of Japan, Journal Name: Journal of the Physical Society of Japan Journal Issue: 4 Vol. 17; ISSN 0031-9015
• Publisher: Physical Society of Japan
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM SILICATES
CRYSTALS
FREQUENCY
GARNETS
HEMATITE
IRON 57
IRON OXIDES
LATTICES
MAGNETIC FIELDS
MAGNETITE
MEASURED VALUES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
OXIDES
PHYSICS
RARE EARTHS
YTTRIUM