Magnetic hyperfine interactions of <sup>119</sup>Sn probe atoms in the binary perovskite CaCu<sub>3</sub>Mn<sub>4</sub>O<sub>12</sub>
BARANOV, Alexey
Chair of Radiochemistry, Department of Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
Chair of Radiochemistry, Department of Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Article de revue
This item was published in
Journal of Experimental and Theoretical Physics (JETP) / Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki. 2009, vol. 108, n° 4, p. 605-615
MAIK Nauka/Interperiodica
English Abstract
The manganite CaCu<sub>3</sub>Mn<sub>4</sub>O<sub>12</sub> doped by <sup>119</sup>Sn atoms (about 1 at % with respect to Mn atoms) is studied by Mössbauer spectroscopy. The introduction of diamagnetic tin atoms is found ...Read more >
The manganite CaCu<sub>3</sub>Mn<sub>4</sub>O<sub>12</sub> doped by <sup>119</sup>Sn atoms (about 1 at % with respect to Mn atoms) is studied by Mössbauer spectroscopy. The introduction of diamagnetic tin atoms is found not to affect the structure of the manganite. Tetravalent tin atoms are shown to substitute for the isovalent manganese atoms that are located in an octahedral oxygen surrounding. The cluster method of molecular orbitals is used to calculate the contributions of Mn<sup>4+</sup> and Cu<sup>2+</sup> cations that belong to different structural sublattices to the hyperfine magnetic field at <sup>119</sup>Sn nuclei (<i>H</i> <sub>Sn</sub> = 105 kOe at <i>T</i> = 77 K). These partial contributions are analyzed, and the intrasublattice Mn<sup>4+</sup>-O-Mn<sup>4+</sup> exchange interactions are found to play a significant role in the formation of the magnetic structure of the manganite.Read less <
English Keywords
Mössbauer spectroscopy
Solid solution
Magnetism
Perovskite
Origin
Hal imported