Low-Field Magnetoresistance in Manganite Thin Films
E.S. Vlakhova,b, K. Dörra, K.-H. Müllera, A. Handsteina, K. Nenkova,b, T. Waltera, R.A. Chakalovc, R.I. Chakalovac and A.Y. Spasovc
a Institut für Festkörper- und Werkstofforschung Dresden, P.O. Box 270016, 01171 Dresden, Germany
b International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-529 Wrocław, Poland
c Institute of Electronics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria
Full Text PDF
Grain boundaries play an important role in low-field magnetoresistance of La0.7Ca0.3MnO3 and La0.7Sr0.3MnO3 thin films deposited by magnetron sputtering and pulsed laser deposition on YSZ(100) and silicon substrates buffered by YSZ. Well-pronounced low-field magnetoresistance hysteresis was observed in magnetic fields applied in in-plane and out-of-plane directions. High values of local magnetoresistance sensitivity d(MR)/dH in the vicinity of the coercive field were obtained reaching up to 0.2%/Oe for La0.7Ca0.3MnO3 samples at 5 K.
DOI: 10.12693/APhysPolA.97.787
PACS numbers: 75.70.Ak, 73.50.Dn