Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 417, Issue -, Pages 130-136Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2016.05.052
Keywords
Barium hexaferrites; Neutron diffraction; Vibration magnetometry; Crystal and magnetic structures
Funding
- Ministry of Education and Science of the Russian Federation [K4-2015-040]
- Belarusian Republican Foundation for Fundamental Research [F15d-003]
- Joint Institute for Nuclear Research [04-4-1121-2015/2017]
- Russian Federation State contract for organizing a scientific work
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The investigations of the crystal and magnetic structure by powder neutron diffractometry as well as the magnetic properties by vibration sample magnetometry for the BaFe(12-x)ln(x)O(19) (x=0.1-1.2) solid solutions have been performed at different temperatures and magnetic fields. The atomic coordinates and lattice parameters have been Rietveld refined. The Invar effect has been observed in low temperature range (from 150 K to 10 K). It was explained by the thermal oscillation anharmonicity of atoms. The increase of microstress value with decreasing temperature has been defined from Rietveld refinement. The Curie temperature and change of total magnetic moment per formula unit have been defined for all the compositions of the barium hexaferrites BaFe12-xInxO19 (x=0.1-1.2) solid solutions. The magnetic structure model is proposed. The most likely reasons and the mechanism of magnetic structure formation are discussed. (C) 2016 Elsevier B.V. All rights reserved.
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