Strain-induced large low-field magnetoresistance in Pr0.67Sr0.33MnO3 ultrathin films
Abstract
We report magnetoresistance (MR) measurements in very thin Pr0.67Sr0.33MnO3 films (5-15 nm) grown on LaAlO3 (001) substrates. The films are under compressive strain imposed by the lattice mismatch with the substrate. The MR ratio [R(H)-R0]/R0 is ∼92% at H=800 Oe and T=70 K when the magnetic field is applied perpendicular to the film plane and is much smaller when the magnetic field is parallel to the film plane. We suggest that the large low-field MR is due to strain-induced magnetic anisotropy and spin-dependent scattering at domain boundaries.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 1998
- DOI:
- 10.1063/1.122461
- Bibcode:
- 1998ApPhL..73.2360W
- Keywords:
-
- 73.61.-r;
- 75.70.Ak;
- 73.50.Jt;
- 75.70.Pa;
- 68.60.Bs;
- 75.30.Gw;
- Electrical properties of specific thin films;
- Magnetic properties of monolayers and thin films;
- Galvanomagnetic and other magnetotransport effects;
- Mechanical and acoustical properties;
- Magnetic anisotropy