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Preparation and Characterization of the Single-Layered Cobaltate La2-xCaxCoO4

Published online by Cambridge University Press:  14 January 2011

D. Fuchs ,
M. Merz ,
R. Schneider  and
H. v. Löhneysen
D. Fuchs
Affiliation:
Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany
M. Merz
Affiliation:
Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany
R. Schneider
Affiliation:
Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany
H. v. Löhneysen
Affiliation:
Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany Karlsruher Institut für Technologie, Physikalisches Institut, 76131 Karlsruhe, Germany
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Abstract

Polycrystalline samples of the single-layered cobaltate La2-xCaxCoO4 were prepared in a wide doping range of 0 ≤ x ≤ 1.5. Structural properties were characterized at room temperature. The orthorhombic distorted structure of the mother compound La2CoO4 changes to a tetragonal structure for x = 0.5 and then becomes orthorhombic again for x > 0.5. The magnetic properties were investigated in the temperature range from 5 K ≤ T ≤ 300 K. With increasing hole-doping a successive decrease of antiferromagnetic exchange is observed for x ≤ 0.5 whereas an increase of ferromagnetic exchange evolves for x ≥ 0.5.

Keywords

oxidemagnetic propertiesCo
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1292: Symposium K – Oxide Nanoelectronics , 2011 , mrsf10-1292-k12-09
Copyright
Copyright © Materials Research Society 2011

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References

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