Topic
Magnetic structure
About: Magnetic structure is a research topic. Over the lifetime, 10787 publications have been published within this topic receiving 207143 citations.
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TL;DR: A direct correlation between cationic distribution and spin canting has been proposed, explaining the presence of a noncollinear spin structure in terms of superexchange interaction energy produced by the average cationIC distribution and vacancies in the spinel structure.
Abstract: Magnetic properties of iron oxide nanoparticles with spinel structure are strictly related to a complex interplay between cationic distribution and the presence of a non-collinear spin structure (spin canting). With the aim to gain better insight into the effect of the magnetic structure on magnetic properties, in this paper we investigated a family of small crystalline ferrite nanoparticles of the formula CoxNi1−xFe2O4 (0 ≤ x ≤ 1) having equal size (≈4.5 nm) and spherical-like shape. The field dependence of magnetization at low temperatures indicated a clear increase of magnetocrystalline anisotropy and saturation magnetization (higher than the bulk value for CoFe2O4: ∼130 A m2 kg−1) with the increase of cobalt content. The magnetic structure of nanoparticles has been investigated by Mossbauer spectroscopy under an intense magnetic field (8 T) at a low temperature (10 K). The magnetic properties have been explained in terms of an evolution of the magnetic structure with the increase of cobalt content. In addition a direct correlation between cationic distribution and spin canting has been proposed, explaining the presence of a noncollinear spin structure in terms of superexchange interaction energy produced by the average cationic distribution and vacancies in the spinel structure.
55 citations
TL;DR: In this article, the effect of temperature on the features of the crystal and magnetic structures, as well as the magnetic properties of the solid solution of SrFe10.8In1.2O19 hexaferrite was investigated.
55 citations
TL;DR: In this paper, the magneto-optical Kerr effect was applied on natural and synthetic Ti-ferrites and the experimental success was based on 1.1 -the achievement of a sufficiently smooth and stressfree surface obtained by polishing with amorphous SiO 2 suspension and 2.2 -the use of digital image processing.
55 citations
55 citations
TL;DR: In this article, a low temperature x-ray diffraction experiment was performed to investigate the crystal symmetry of antiferromagnetic CoO and its domain structure, and a new rhombohedral deformation was found in addition to the well known tetragonal deformation.
Abstract: Low temperature x-ray diffraction experiment were performed to investigate the crystal symmetry of antiferromagnetic CoO and its domain structure. A new rhombohedral deformation was found in addition to the well known tetragonal deformation. The experimental result is consistent with the magnetic structure found by Roth, and can be interpreted by Kanamori's theory. Two types of magnetic domains were found to exist in CoO, as are expected from the magnetic structure and the related lattice deformations.
55 citations