Title :
Absence of ferromagnetism and strong orbital coupling in carrier rich Zn1-xInxCo0.075O
Author :
Wang, X.L. ; Peleckis, G. ; Dou, S.X.
Author_Institution :
ISEM, Wollongong Univ., NSW, Australia
Abstract :
Polycrystalline samples of Zn1-xInxCo0.075O (0.010≤x≤0.020) diluted magnetic semiconductors were prepared by the rapid oxalate decomposition technique. Phase purity is analyzed by means of X-ray diffraction technique and structures are refined by Rietveld refinement technique. Bulk conductivity of the polished pellets was measured by two-point probe technique at 295 K. Magnetic properties were analyzed with magnetic property measurement system. Samples show paramagnetic behavior and Curie-Weiss fitting at high temperature range gave effective magnetic moment of Co ions. Magnetization behavior caused by applied magnetic field was also investigated. High itinerant carrier concentration was achieved but no ferromagnetism was observed in the samples.
Keywords :
II-VI semiconductors; X-ray diffraction; carrier density; decomposition; electrical conductivity; indium compounds; magnetic moments; magnetisation; paramagnetic materials; semimagnetic semiconductors; wide band gap semiconductors; zinc compounds; 295 K; Curie-Weiss fitting; Rietveld refinement technique; X-ray diffraction; Zn1-xInxCo0.075O; applied magnetic field; bulk conductivity; carrier rich material; diluted magnetic semiconductors; ferromagnetism; itinerant carrier concentration; magnetic moments; magnetic properties; magnetization; orbital coupling; paramagnetism; phase purity; polished pellets; polycrystalline materials; rapid oxalate decomposition; two-point probe technique; Conductivity measurement; Extraterrestrial measurements; Magnetic analysis; Magnetic field measurement; Magnetic properties; Magnetic semiconductors; Paramagnetic materials; Probes; X-ray diffraction; Zinc;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463818
