Structural and magnetic properties of La/sub 1-x/Sr/sub x/CoO/sub 3

The structural and the magnetic properties of polycrystalline La/sub 1-x/Sr/sub x/CoO/sub 3/ (LSCO) have been studied experimentally. The single LSCO phase in all the prepared samples were confirmed by the X-ray diffraction and X-ray photoelectron spectroscopy measurements. From the temperature depe...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2005-10, Vol.41 (10), p.2772-2774
Main Authors: Yu, K.K., Park, J.S., Bae, H.R., Kim, J.Y., Lee, Y.P., Lee, Y.S., Kang, J.H.
Format: Article
Language:English
Subjects:
Antiferromagnetic materials
Character generation
Cluster glass (CG)
Magnetic properties
Magnetic semiconductors
Magnetoresistance
neutron diffraction
Neutrons
Powders
Strontium
Temperature dependence
X-ray diffraction
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Summary:The structural and the magnetic properties of polycrystalline La/sub 1-x/Sr/sub x/CoO/sub 3/ (LSCO) have been studied experimentally. The single LSCO phase in all the prepared samples were confirmed by the X-ray diffraction and X-ray photoelectron spectroscopy measurements. From the temperature dependence of inverse magnetic susceptibility, the Curie temperatures are found to be 147 K, 217 K, and 232 K for x=0.15,0.25, and 0.3, respectively. However, zero-field-cooled magnetization measurement reveals a spin-glass-like behavior for x=0.15. A neutron-diffraction study does not reveal the existence of an antiferromagnetic phase at low temperatures. It is thought that a more advanced magnetic model is required to elucidate the spin-glass behavior at low Sr concentrations.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2005.854830