The phase diagram of colossal magnetoresistive compounds La1-xBaxMnO3 (0≤x≤1) was obtained for the first time through magnetization (5 K≤T≤360 K, -7 T ≤H≤7 T) and resistivity (100 K≤T≤400 K) measurements. Unexpectedly, La1-xBaxMnO3 compounds were found to be ferromagnetic for all x with varying magnitude of saturation magnetization (MS) with theoretically maximum MS for 0.13<x<0.5 and reduced MS for both x<0.13 and x>0.5. Near x = 0.5, the ground state changes from single phase ferromagnetic metallic state to multiphase ferromagnetic insulator state. In the two reduced MS doping regimes of x<0.13 and x>0.5, the former showed an anomalous strong field history-dependent magnetization behavior, but the latter showed a rather conventional field history-dependent magnetization behavior. We discuss the possible causes of these differences and spin structures of La1-xBaxMnO3 compounds.
Bibliographical noteFunding Information:
We thank Drs. E.O. Ji and N.H. Huhr for their help in X-ray analysis. We also thank Drs. K. Moon, S.H. Park, G.T. Park for helpful discussions. This work was supported by the Basic Science Research Institute Program, Korea Research Foundation, 1998, Project No. 1998-015-D00121.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics