Anisotropic magnetoresistance and anomalous Hall effect in manganite thin films

We report on anisotropic magnetoresistance (AMR) and Hall effect measurements along the [1(1) over bar 0] and [001] directions in a (110)-oriented La2/3Ca1/3MnO3 thin film. While the electrical resistivity and the ordinary Hall coefficient are smaller for I along [001], evidencing some anisotropy of the Fermi surface, both the AMR and the anomalous Hall coefficient are larger when the current is applied along [1(1) over bar 0]. Since these two phenomena originate from spin-orbit coupling effects, we state that our results support an anisotropy of the spin-orbit interaction in manganites. The possible origin of this anisotropy is discussed.