Growth and observation of low-field giant magnetoresistance in La0.7Sr0.3MnO3/ZnO superlattice structures.
We report the growth of a new class of superlattice structure, consisting of alternate layers of La0.7Sr0.3MnO3 (LSMO) and ZnO, which exhibits giant magnetoresistance at low fields. These superlattices were fabricated using a novel pulsed-laser deposition technique with a specially designed target assembly. Giant magnetoresistance of > 250% has been observed in these structures in current-in-plane configuration on the application of just -400 Gauss of magnetic field over the broad temperature range 15-200 K. Observation of giant magnetoresistance at such low magnetic fields is a groundbreaking step in the field of novel magnetic materials and devices.
Nanostructured Materials Research Laboratory (NMRL), Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA.
Ashutosh
A
Tiwari
J
J
Narayan
D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D007811:Lanthanum / Q000737:chemistry*; D008280:Magnetics; D017895:Manganese Compounds / Q000737:chemistry*; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
D017895:Manganese Compounds; D010087:Oxides; C027424:manganese oxide; D007811:Lanthanum; D015034:Zinc Oxide; D013324:Strontium