Magnetic properties of quasi-two-dimensional La1−xSr1+xMnO4 and the evolution of itinerant electron ferromagnetism in the SrO·(La1−xSrxMnO3)n system

Mohan Ram, R. A. ; Ganguly, P. ; Rao, C. N. R. (1987) Magnetic properties of quasi-two-dimensional La1−xSr1+xMnO4 and the evolution of itinerant electron ferromagnetism in the SrO·(La1−xSrxMnO3)n system Journal of Solid State Chemistry, 70 (1). pp. 82-87. ISSN 0022-4596

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/002245...

Related URL: http://dx.doi.org/10.1016/0022-4596(87)90180-0

Abstract

Quasi-two-dimensional oxides of the La1−xSr1+xMnO4 system, possessing the K2NiF4 structure, show no evidence for ferromagnetic ordering in contrast to the corresponding three-dimensional La1−xSrxMnO3 perovskites. Instead, there is an increasing tendency toward antiferromagnetic ordering with increasingx in La1−xSr1+xMnO4. Furthermore, these oxides are relatively high-resistivity materials over the entire compositional range. Substitution of Ba for Sr in La0.5Sr1.5MnO4 decreases the ferromagnetic interaction. Increasing the number of perovskite layers in SrO·(La1−xSrxMnO3)n causes an increase in electrical conductivity as well as ferromagnetic interaction. The oxide becomes a highly conducting ferromagnet when n≥2.

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