Transport and magnetic properties of delafossite CuAl1-xMnxO2 ceramics

We report on the transport and magnetic properties of Mn-doped CuAlO2 ceramics (CuAl1-xMnxO2, 0 less than or equal to x less than or equal to 0.05) fabricated by standard solid solution method in an air atmosphere at a sintering temperature of 1150 degreesC. The equilibrium solubility of Mn ions in CuAlO2 was found to be as low as 3 mol%. Non-doped CuAlO2 ceramics were semiconducting with a hole concentration of similar to5.8 x 10(16) cm(-3) and an increase of Mn ion rapidly reduced the hole concentration. The magnetization measurements for all CuAl1-xMnxO2 samples showed paramagnetic behaviors and a negative value of the Curie-Weiss temperature corresponding to antiferromagnetic exchange coupling between Mn ions in delafossite CuAlO2 lattice. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Publisher
Wiley-Blackwell
Issue Date
2004-06
Language
ENG
Keywords

OXIDES; SEMICONDUCTORS; CUALO2

Citation

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, v.241, no.7, pp.1545 - 1548

ISSN
0370-1972
URI
http://hdl.handle.net/10203/82412
Appears in Collection
MS-Journal Papers(저널논문)
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