Crystalline and magnetic structures of La{sub 1-x}Bi{sub x}MnO{sub 3+{delta}} manganites

Journal Article · Sat Jul 15 04:00:00 EDT 2006 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776106070077· OSTI ID:21067674

Troyanchuk, I O; Mantytskaya, O S ^[1]; Tovar, M ^[2]; Szymczak, H ^[3]

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1. National Academy of Sciences of Belarus, Joint Institute of Solid State and Semiconductor Physics (Belarus)
2. Hahn-Meitner Institute, Berlin Neutron Scattering Center (BENSC) (Germany)
3. Polish Academy of Sciences, Institute of Physics (Poland)

The crystalline and magnetic structures and magnetic properties of La{sub 1-x}Bi{sub x}MnO{sub 3+{delta}} (0.4 {<=} x {<=} 0.6, 0 {<=} {delta} {<=} 0.06) manganites have been studied. The solid solutions having the stoichiometric oxygen content are shown to be orbitally ordered A-type antiferromagnets. An increase in the oxygen content above the stoichiometric value is found to cause Mn{sup 4+} ions in the perovskite lattice, to remove the cooperative Jahn-Teller distortions, and to form a long-range ferromagnetic order. This order becomes broken as the concentration of the tetravalent manganese ions increases further. The tendency toward breaking the ferromagnetic order increases with the bismuth content. The magnetic properties are interpreted in terms of superexchange interactions on the assumption of local lattice distortions induced by anisotropy of the 6s{sup 2}(Bi{sup 3+})-2p{sup 6}(O{sup 2-}) chemical bonds.

• OSTI ID: 21067674
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 1 Vol. 103; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BISMUTH COMPOUNDS
BISMUTH IONS
CHEMICAL BONDS
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MANGANESE IONS
MANGANESE OXIDES
OXYGEN
OXYGEN IONS
SOLID SOLUTIONS
STOICHIOMETRY