NMR Study of the Low Temperature Phase of Fe_3O_4.I.Experiments

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概要

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• The hyperfine field spectra of magnetite have been investigated at 4.2 K withand without magnetic cooling. From the spectra, it has been confirmed thatthree types of resonance lines exist and they are ascribed to Fe"(,4) tons, Fe"(#)ions and Fe"(J) ions. Fe"(B) ions occupy five ineq uivalent positions of B sites.We have found that, with the application of the magnetic field, each Fe"(J)line splits into two or four lines, even if the specimen has the fixed uniform a-, b-and c-axes. Angular dependence of the resonance frequencies of Fe"(#) ionsobtained by rotating external tnagnetic field was also observed. We have foundthat the splittings and the anisotropy of the spectra can be explained quantitativelyby the symmetry of the site, which is approximately uniaxial along one of the(111) directions. For Fe"(#) ions, the main part of the anisotropy can beexplained by the magnetic dipole field of the surrounding Fe ions.

• 社団法人日本物理学会の論文
• 1978-05-15

著者

• Mizoguchi Moriji

  Department of General Education, Tokyo Medical and Dental University

関連論文

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• Absence of Heat Capacity Anomaly at about 10 K in Fe_3O_4
• The Transistorized B-H Loop Tracer and the Asteroid Curve Tracer
• Temparature Dependence of NMR of Magnetic at about 10 K
• Thyratron Switch for Pulsed NMR Apparatus
• Abrupt Change of NMR Line Shape in the Low Temperature Phase of Fe_3O_4
• Structure of Fe_3O_4 in the Low Temperature Phase as Deduced from Advanced Analysis of the NMR Study
• NMR Study of the Low Temperature Phase of Fe_3O_4.II.Electron Ordering Analysis
• NMR Study of the Low Temperature Phase of Fe_3O_4.I.Experiments
• Temperature Dependence of ^V NMR in V_2O_3 up to 1000 K

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