Angle Resolved Magnetic and Transport Properties of Pr0.7Sr0.3MnO3 Thin Films

In this communication, the variation of the resistance and of the magnetization with respect to the angle between the applied magnetic field and the substrate normal is discussed for a Pr0.7Sr0.3MnO3 thin film at 30 K. An angular hysteresis is observed for these properties and this behavior is correlated with the magnetic domain wall motion. It is shown that the number of domain walls is controlled through the rotation of the applied magnetic field, and that these domain walls play an important part in the colossal magnetoresistance behavior of these films. Furthermore, a model describing the reversal of the magnetization with the rotation of the magnetic field has been developed. This model enables one to extract the dependence of the resistance upon the direction of the magnetization with respect to the crystalline axis. (C) 1998 American Institute of Physics.