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.
Tiwari
Ashutosh
A
Nanostructured Materials Research Laboratory (NMRL), Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA.
Narayan
J
J
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