Anisotropy of magnetoresistance in (110)La0.7Sr0.3MnO3 thin films

We have performed magnetization and magnetoresistance measurements on (110)La0.7Sr0.3MnO3 thin films in order to understand the role of in-plane uniaxial magnetic anisotropy in the magnetoresistance. Transport measurements with current flowing along the magnetically easy {[}001] and magnetically hard {[}1 (1) over bar 0] directions exhibit a linear dependence of magnetoresistance on field at high fields due to bulk colossal magnetoresistance. The low field behavior depends not only on the angle of the magnetization with the current but also the direction of the current in the crystal. (C) 1999 American Institute of Physics. {[}S0021-8979(99)19308-3].