Magnetic hyperfine interactions of {sup 119}Sn probe atoms in the binary perovskite CaCu{sub 3}Mn{sub 4}O{sub 12}
Journal Article
·
· Journal of Experimental and Theoretical Physics
- Moscow State University (Russian Federation)
- University Bordeaux 1 'Sciences and Technologies' (France)
- Russian Academy of Sciences, Institute of Radio Engineering and Electronics (Russian Federation)
The manganite CaCu{sub 3}Mn{sub 4}O{sub 12} doped by {sup 119}Sn atoms (about 1 at % with respect to Mn atoms) is studied by Moessbauer 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+} and Cu{sup 2+} cations that belong to different structural sublattices to the hyperfine magnetic field at {sup 119}Sn nuclei (H{sub Sn} = 105 kOe at T = 77 K). These partial contributions are analyzed, and the intrasublattice Mn{sup 4+}-O-Mn{sup 4+} exchange interactions are found to play a significant role in the formation of the magnetic structure of the manganite.
- OSTI ID:
- 21246915
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 4 Vol. 108; ISSN JTPHES; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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