Anomalous magnetic properties and magnetic phase diagram of La1-xBaxMnO3

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 0.130.5. 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