Critical Behavior near the Ferromagnetic - Paramagnetic Phase Transition in La_(0.7)Sr_(0.3)MnO_(3+d) Nanowires Synthesized by Hydrothermal Method

摘要

We report here the synthesis, characterization and magnetic properties of functional oxide nanowire (NW) of hole doped manganite La_(0.7)Sr_(0.3)MnO_(3+d) (LSMO). The nanowires (NWs) are fabricated by hydrothermal method using autoclave at a temperature of 240°C. Due to size reduction of the NWs the volume of the unit cell decreases ～1% with respect to the bulk La_(0.7)Sr_(0.3)MnO_3. The LSMO NWs have a ferromagnetic - paramagnetic transition temperature or Curie temperature (T_C) at 311 K and it shows second order phase transition at T_C as seen in bulk.