Al-doping 1 Aluminum 1 Applied magnetic fields 1 Barium 1 Barium compounds 1 Boundary effects 1 Colossal magnetoresistance 1 Doping (additives) 1 Electric resistance 1 Electron energy loss spectroscopy 1 Electron-electron scattering 1 Grain-size reduction 1 High-field Low field 1 Low-field magnetoresistanc 1 Low-field magnetoresistance 1 Magnetic and transport properties 1 Magnetic field effects 1 Magnetoelectronics 1 Magnetotransports 1 Manganese 1 Manganese compounds 1 Metal insulator boundaries 1 Metal insulator transition 1 Metal insulator transition temperature 1 Metal-insulator transition temperature Tp 1 Metals 1 Resistivity 1 Semiconductor insulator boundaries 1 Sensing applications 1