Magnetic Structure and Spin-Orientational Transitions of Hexaferrites of the BaCo2−xZnxFe16O27 System
Е. П. НайденSiberian Kuznetsov Physico-Technical Institute, TomskV. I. Mal'tsevResearch Institute of Nuclear Physics, TomskG. I. RyabtsevSiberian Kuznetsov Physico-Technical Institute, Tomsk
ABI
Abstract
A neutronographic study is made of magnetic structure and spin-orientational transitions in polycrystalline samples of the system BaCo2−xZnxFe16O27 (Co2−xZnxW). Along with this studies measurements of the macroscopic magnetic characteristics, X-ray dilatometry, and DTA are performed. The diagram of the magnetic state is plotted in the coordinates: content-temperature. The compounds with Zn2+ ion content, 0 ≦ x ≦ 1.6 exhibit the sequence of orientational phase transitions coneplane-cone-axis of easy magnitization when the temperature increases. The order of these transitions is determined and the role of Co2+ ions for creation of planar anisotropy in oxide ferrimagnetics with hexagonal structure is discussed. [Russian Text Ignored].
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