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Chin. Phys. B, 2016, Vol. 25(1): 016102    DOI: 10.1088/1674-1056/25/1/016102

Evolution of structure and physical properties in Al-substituted Ba-hexaferrites

Alex Trukhanov1,2, Larisa Panina1, Sergei Trukhanov2, Vitalii Turchenko3, Mohamed Salem1
1. National University of Science and Technology MISiS, 119049, Moscow, Leninsky Prospekt, 4, Russia;
2. SSPA Scientific and Practical Materials Research Centre of NAS of Belarus, 220072 RB, Minsk, 19 P. Brovki Str., Russia;
3. Joint Institute for Nuclear Research, 141980, Dubna, 6 Joliot-Curie Street, Russia
Abstract  The investigations of the crystal and magnetic structures of the BaFe12-xAlxO19 (x=0.1-1.2) solid solutions have been performed with powder neutron diffractometry. Magnetic properties of the BaFe12-xAlxO19 (x=0.1-1.2) solid solutions have been measured by vibration sample magnetometry at different temperatures under different magnetic fields. The atomic coordinates and lattice parameters have been Rietveld refined. The invar effect is observed in low temperature range (from 4.2 K to 150 K). It is explained by the thermal oscillation anharmonicity of atoms. The increase of microstress with decreasing temperature is found from Rietveld refinement. The Curie temperature and the change of total magnetic moment per formula unit are found for all compositions of the BaFe12-xAlxO19 (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.
Keywords:  barium hexaferrites      neutron diffraction      crystal and magnetic structures  
Received:  31 July 2015      Revised:  15 September 2015      Published:  05 January 2016
PACS: (Neutron diffraction)  
  61.50.Nw (Crystal stoichiometry)  
  75.10.-b (General theory and models of magnetic ordering)  
Fund: Project supported by the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST “MISiS” (Grant No. K4-2015-040). L. Panina acknowledges support under the Russian Federation State contract for organizing a scientific work.
Corresponding Authors:  Alex Trukhanov     E-mail:

Cite this article: 

Alex Trukhanov, Larisa Panina, Sergei Trukhanov, Vitalii Turchenko, Mohamed Salem Evolution of structure and physical properties in Al-substituted Ba-hexaferrites 2016 Chin. Phys. B 25 016102

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