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Transport and magnetic properties of delafossite CuAl 1− x Mn x O 2 ceramics
Author(s) -
Kim Hyoun Soo,
Lee Byoung Seon,
Ji Sung Hwa,
Kim Hyojin,
Kim Dojin,
Ihm Young Eon,
Choo Woong Kil
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200304519
Subject(s) - delafossite , antiferromagnetism , magnetization , ceramic , materials science , curie temperature , paramagnetism , sintering , analytical chemistry (journal) , ion , solid solution , doping , condensed matter physics , chemistry , ferromagnetism , metallurgy , magnetic field , physics , oxide , optoelectronics , organic chemistry , chromatography , quantum mechanics
We report on the transport and magnetic properties of Mn‐doped CuAlO 2 ceramics (CuAl 1− x Mn x O 2 , 0 ≤ x ≤ 0.05) fabricated by standard solid solution method in an air atmosphere at a sintering temperature of 1150 °C. The equilibrium solubility of Mn ions in CuAlO 2 was found to be as low as 3 mol%. Non‐doped CuAlO 2 ceramics were semiconducting with a hole concentration of ∼5.8 × 10 16 cm −3 and an increase of Mn ion rapidly reduced the hole concentration. The magnetization measurements for all CuAl 1− x Mn x O 2 samples showed paramagnetic behaviors and a negative value of the Curie–Weiss temperature corresponding to antiferromagnetic exchange coupling between Mn ions in delafossite CuAlO 2 lattice. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)