Journal ArticleDOI
Magnetoelectric Effect of Fe 3 O 4 at 77 K. I. Crystal Symmetry
TLDR
In this article, the magnetic crystal symmetry at 77 K is triclinic, but the breaking of the mirror symmetry parallel to the (1\bar10) plane is very small.Abstract:
Magnetoelectric effect of the low temperature phase of magnetite was measured at 77 K. It was confirmed that the magnetic crystal symmetry at 77 K is triclinic but the breaking of the mirror symmetry parallel to the (1\bar10) plane is very small. Dispersion of the magnetoelectric effect was observed with the relaxation time of approximately 2 µs. Magnitude of magnetoelectric susceptibility depends on the direction of the applied electric field. Both phenomena were attributed to the dispersion and the anisotropy of the electric susceptibility. The structure of the low temperature phase was discussed briefly in connection with the model proposed by Mizoguchi (J. Phys. Soc. Jpn. 44 (1978) 1512).read more
Citations
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Journal ArticleDOI
Multi-ferroic magnetoelectrics
TL;DR: In this paper, the authors reviewed the domain aspects of multi-ferroics, i.e. of materials, in which two or all three properties of the properties "ferroelectricity" and "ferromagnetism" occur simultaneously in the same phase, and in which the magnetic point group has been reliably established by magnetoelectric, optical, dielectric and related studies on single crystals and single domains.
Journal ArticleDOI
The Verwey transition - a topical review
TL;DR: The story of the Verwey transition in magnetite over a period of about 90 years, from its discovery up to the present, can be subdivided into three eras as mentioned in this paper.
Book ChapterDOI
Chapter 3 Progress in spinel ferrite research
TL;DR: In this paper, the progress in spinel ferrite research is discussed and a large number of oxides with a metal-oxygen ratio of 0.75 as composition is known to crystallize into the spinel structure.
Journal ArticleDOI
Nature of the Verwey transition in magnetite (Fe3O4) to pressures of 16 GPa
TL;DR: It was shown that the variation of ${\Mathit{T}}_{\mathit{V}}$ with rising P is in close analogy to ${\math it{T}_{\ mathit-V}}, which is typical of the variable-range hopping (VRH) mechanism.
Journal ArticleDOI
Structure of Fe3O4 at low temperatures
TL;DR: In this paper, the structure of Fe3O4 at low temperatures is analyzed in detail based on all the experimental results hitherto obtained, and the idealized superstructure at 0 K, has been uniquely derived.
References
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Journal ArticleDOI
Ordering and Antiferromagnetism in Ferrites
TL;DR: The octahedral sites in the spinel structure form one of the anomalous lattices in which it is possible to achieve essentially perfect short-range order while maintaining a finite entropy.
Journal ArticleDOI
Dielectric Properties of Fine Particles of Fe3O4 and Some Ferrites
TL;DR: In this paper, the dispersions of resistivity and dielectric constant of fine oxides over a frequency range from 10 Hz to 1 MHz in the temperature range from 77°K to 300°K were studied.
Journal ArticleDOI
Magnetocrystalline Anisotropy of Low Temperature Phase of Magnetite
TL;DR: In this paper, the magnetocrystalline anisotropy of low temperature phase of magnetite (Fe 3 O 4 ) was measured for a monoclinic single phase specimen by using computerized fully-automatic torque magnetometer.
Journal ArticleDOI
Neutron Scattering from Magnetite below 119°K
TL;DR: In this article, it was shown that the low-temperature structure of magnetite gives rise to weak extra neutron diffraction lines that can be indexed as (h, k, l±½) in cubic indices.
Journal ArticleDOI
Electron microscopy of orthorhombic phase in magnetite
TL;DR: In this paper, an electron microscopic observation on a synthetic single crystal of magnetite has been carried out at a temperature range between 77°K and room temperature, and it was observed that the ordered phases below the low-temperature transition appear as finely divided stripes.
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