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Investigation of Crystal and Magnetic Structure of BiFeO_{3} Using Neutron Diffraction

100%
Sosnowska I., Przeniosło R., Fischer P., Murashov V. A.
Acta Physica Polonica A
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1994
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vol. 86
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issue 4
629-631
EN
Polycrystalline material obtained from the ground single crystal of BiFeO_{3} reported as not having the superstructure, shows the superstructure reflections in neutron diffraction pattern. The determined magnetic moment of antiferromagnetically ordered Fe^{3+} ions is μ_{Fe} = (3.70±0.03)μ_{B} at 293 K.
2
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BiFeO_3 Crystal Structure at Low Temperatures

100%
Palewicz A., Sosnowska I., Przeniosło R., Hewat A.
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issue 2
296-301
EN
The crystal and magnetic structure of BiFeO_3 have been studied with the use of high resolution neutron diffraction between 5 K and 300 K. The atomic coordinates in BiFeO_3 are almost unchanged between 5 K and 300 K.
3
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Thermal Lattice Parameters Variation of CaCu_xMn_{7-x}O_{12} Compounds with Trigonal Crystal Structure

88%
Sławiński W., Przeniosło R., Sosnowska I., Bieringer M., Margiolaki I.
Acta Physica Polonica A
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2008
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vol. 113
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issue 4
1225-1230
EN
We report the crystal structure evolution of CaCu_{0.2}Mn_{6.8}O_{12} as a function of temperature between 10 K and 290 K. The analysis of the diffraction data is carried out with the Rietveld method applied to the average trigonal structure of CaCu_{0.2}Mn_{6.8}O_{12}. The x = 0.2 member shows similar low temperature extrema for the unit cell parameter evolution as the previously reported x = 0.1 and x = 0 members of the CaCu_xMn_{7-x}O_{12} system. All magnetic and crystallographic transition temperatures indicated by the unit cell parameter evolution obtained by powder X-ray diffraction methods systematically decrease with increasing Cu content, x.
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