Abstract
We investigated the anisotropic magnetoresistance (AMR) effects for La 0.67(Ca1-xSrx)0.33MnO3 films epitaxially grown on (001) oriented SrTiO3 substrates. The increase of Sr doping gives rise to the enhancement of the metal-insulator transition temperature, but suppresses the AMR amplitude. The dependence of AMR on the magnetic field orientation for the Sr doping samples shows the coexistence of two-fold and four-fold symmetries, which is changed with varying the temperature. Moreover, the sign of AMR is changed from negative to positive with increasing the temperature. The abnormal AMR behaviors can be understood by different s-d scattering occurring at different temperatures.
| Original language | English |
|---|---|
| Article number | 17C722 |
| Journal | Journal of Applied Physics |
| Volume | 113 |
| Issue number | 17 |
| DOIs | |
| State | Published - 7 May 2013 |
| Externally published | Yes |