Structure and electrical properties in La2/3(Ca1−xSrx)1/3MnO3 films

✍ Scribed by K.X. Jin; C.L. Chen; S.L. Wang; S.G. Zhao; Y.C. Wang; Z.M. Song

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 191 KB
• Volume: 119
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2005.01.020

✦ Synopsis

The thin films of La 2/3 (Ca 1-x Sr x ) 1/3 MnO 3 (LCSMO) with x = 0, 1/3, and 2/3 through the Ca, Sr double-doping at A site of the La 2/3 A 1/3 MnO 3 were prepared using the RF magnetron sputtering method. The X-ray diffraction patterns of the bulk samples show that with the increase of x, the structures exhibit the transition from the rhombohedral phase to the pseudo-cubic phase. The electrical properties show that these three thin films are the ferromagnetic and metallic state which can be fitted into the single magneton scattering formula: ρ(T) = ρ 0 + aT 2 at low temperature. The temperature range of the ferromagnetic metallic state becomes larger, and the peak resistivity temperature (T p ) increases with x. These can be qualitatively explained by the double exchange model.