Relevancy of phase separation between electrical and thermal properties in La0.8Sr0.2MnO3 thin films

✍ Scribed by Chunhua Wu; Jiawen Qiu; Yanchun He

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 251 KB
• Volume: 406
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2011.02.048

✦ Synopsis

For the purpose of finding the relevancy of phase separation between electrical and thermal properties, La 0.8 Sr 0.2 MnO 3 thin films, deposited on quartz glass substrates, were studied for temperature dependent resistance and thermal emittance. Based on the phase separation concept, metal phase volume fraction f was calculated from the temperature dependence of resistance and emittance properties by a phenomenological model and two-energy-level Boltzmann distribution, respectively. The two sets of f coincide with each other very well. The results show f plays an important role in the electrical transportation and thermal properties, and the two properties are essentially correlated by f.