Title :
Structural and magnetic properties of La1-xSrxCoO3
Author :
Yu, K.K. ; Park, J.S. ; Bae, H.R. ; Kim, J.Y. ; Lee, Y.P. ; Lee, Y.S. ; Kang, J.-H.
Author_Institution :
Dept. of Phys., Hanyang Univ., Seoul, South Korea
Abstract :
The structural and the magnetic properties of polycrystalline La1-xSrxCoO3 (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.
Keywords :
Curie temperature; cobalt compounds; crystal structure; lanthanum compounds; magnetic cooling; magnetic susceptibility; magnetisation; spin glasses; strontium compounds; 147 K; 217 K; 232 K; Curie temperature; LaSrCoO3; crystal structure; inverse magnetic susceptibility; magnetic cooling; magnetic properties; neutron-diffraction study; polycrystalline La1-xSrxCoO3; single LSCO phase; spin-glass-like behavior; structural properties; zero-field-cooled magnetization; Antiferromagnetic materials; Character generation; Magnetic properties; Magnetic semiconductors; Magnetoresistance; Neutrons; Powders; Strontium; Temperature dependence; X-ray diffraction; Cluster glass (CG); La; neutron diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854830
