Strain effect and the phase diagram of La1-xBaxMnO3 thin films -: art. no. 184404

We report magnetic and transport properties of La1-xBaxMnO3 (x = 0.05-0.33) epitaxial thin films. Compared with the corresponding bulk materials. the ferromagnetic transition temperature is reduced in the compressive strained La1-xBaxMnO3 thin films with x = 0.3 and 0.33, but enhanced significantly in the tensile strained thin films with x less than or equal to 0.2. Especially, ferromagnetism and low field colossal magnetoresistance effect were observed around room temperature in x = 0.1 thin film, and as x = 0.05, a spin-canting insulating state in bulk shifts to ferromagnetic metallic state in thin film. The phase diagram of La1-xBaxMnO3 thin films was obtained, and strain effect on these novel properties was discussed.