Affiliation:
1. Universities Joint Key Laboratory of Photoelectric Detection Science and Technology in Anhui Province, School of Physics and Materials Engineering, Hefei Normal University, Hefei 230601, China
2. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
Abstract
The perovskite LaCoO3 and La0.8Sr0.2CoO3 thin films were synthesized successfully by a polymer-assisted deposition method. The structural characterization and thermal decomposition measurements indicate that appropriately increasing the annealing temperature is helpful in improving the film crystallinity. Compared with LaCoO3 films, the Curie temperature is enhanced to a higher temperature in La0.8Sr0.2CoO3 films, which is attributed to the changes in both the valence state and spin state induced by the chemical doping. In addition, a broad transition temperature region is observed in La0.8Sr0.2CoO3 films, revealing the existence of inhomogeneous ground states in this system.
Funder
National Natural Science Foundation of China
Anhui Provincial Natural Science Foundation
Scientific Research Project of Higher Education
Universities Joint Key Laboratory of Photoelectric Detection Science and Technology
Scientific Research Start-up Fund for Introduction of High-level Talents of HFNU
China Postdoctoral Science Foundation
Anhui Postdoctoral Foundation
HFIPS Director’s Fund
R&D Project for Qingdao XITE CARBON Co., Ltd.
R&D Project for Hefei Yuwang Membrane Engineering Technology Co., Ltd.
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering