Two-dimensional antiferromagnetic correlations in an [La.sub.1.4][Sr.sub.1.6]

• Published in: Journal of experimental and theoretical physics Vol. 124; no. 5; pp. 786 - 1571
• Main Authors: Bykov, A.A, Zobkalo, I.A, Dubrovskii, A.A, Smirnov, O.P, Nikitin, S.E, Terentev, K.Yu, Gavrilov, S.V, Shaikhutdinov, K.A
• Format: Journal Article
• Language: English
• Published: Springer 01.05.2017
• Subjects: Anisotropy; Cobalt; Electric properties; Ferromagnetism; Magnetization; Perovskite; Rare earth metal compounds
• ISSN: 1063-7761; 1090-6509
• DOI: 10.1134/S1063776117050120

The temperature and field dependences of the magnetization, the electrical resistivity, and the magnetostriction of bilayer lanthanum manganite LaL4SrL6[Mn.sub.2][O.sub.7] single crystals and cobalt-doped [La.sub.1.4][Sr.sub.1.6][([Mn.sub.0.9][Cu.sub.0.1]).sub.2][O.sub.7] are measured. The magnetostriction of the cobalt -doped compound increases as compared to the initial [La.sub.1.4][Sr.sub.1.6][Mn.sub.2][O.sub.7] compound, and the magnetization and the magnetoresistance of the former compound change substantially. Powder and single-crystal neutron diffraction patterns are used to detect ferromagnetic ordering in [La.sub.1.4][Sr.sub.1.6][([Mn.sub.0.9][Co.sub.0.1]).sub.2][O.sub.7] at a temperature below [T.sub.C] ~ 45(2) K, and this ordering coexists with antiferromagnetic correlations, which develop at temperatures below [T.sub.C] ~ 80(5) K.