DocumentCode
438330
Title
Structures, spin glass and spin states in perovskite GdMnxCo1-xO3 (x ≤ 0.5)
Author
Farhoudi, M. Mehdi ; Wang, X.L.
Author_Institution
Spintronic & Electron. Mater. Group, Wollongong Univ., NSW, Australia
fYear
2005
fDate
4-8 April 2005
Firstpage
1679
Lastpage
1680
Abstract
The structures, ferromagnetism, spin glass and spin states of Co and Mn in a polycrystalline ceramic samples of GdCo1-xMnxO3 (x = 0.2, 0.3, 0.4, 0.5) are presented. X-ray diffraction show that all the samples are single phase and crystallize as orthorhombic structures and that the lattice parameters gradually increase with x. Spin glass state and two peak features (corresponding to first order ferromagnetic and second order transition) in dc and ac susceptibility are observed. Curie-Wise fitting on the inverse susceptibility-temperature plots indicates that the valences of Co or Mn changed from 2+ or 4+ to 3+ when Co amount increases. Possible spin state transformation of Co and Mn is also suggested.
Keywords
X-ray diffraction; ceramics; crystal structure; ferromagnetic materials; gadolinium compounds; lattice constants; magnetic susceptibility; magnetic transitions; spin glasses; valency; Curie-Wise fitting; GdCo1-xMnxO3; X-ray diffraction; ac susceptibility; dc susceptibility; ferromagnetism; first order ferromagnetic transition; inverse susceptibility-temperature plots; lattice parameters; orthorhombic structures; polycrystalline ceramics; second order transition; spin glass; spin state transformation; spin states; valences; Amorphous magnetic materials; Frequency; Glass; Magnetic field measurement; Magnetic materials; Magnetoelectronics; Paramagnetic materials; Superconducting magnets; Superconducting materials; Temperature;
fLanguage
English
Publisher
ieee
Conference_Titel
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN
0-7803-9009-1
Type
conf
DOI
10.1109/INTMAG.2005.1464273
Filename
1464273
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