We report low-field magnetoresistance (LFMR) of strained ultrathin Pr0.67Sr0 33MnO3 (PSMO) films. We observed very large LFMR, a factor of 7 of resistance change in zero-field-cooled sample at 80 K and 2000 Oe, in ultrathin PSMO films on LaAlO3 (LAO) (100). Samples with compressive (on (LAO), tensile (on SrTiO3 (100)) and very small strain (on NdGaO3 (110)) have been studied systematically and remarkable differences were observed. We also observed large LFMR anisotropy between magnetic fields applied parallel and perpendicular to the film surface. Our results demonstrated that strain and strain-induced spin scattering can result in large LFMR effect.
All Science Journal Classification (ASJC) codes
- Statistical and Nonlinear Physics
- Condensed Matter Physics