J.L. Tholence, F. Holtzberg, et al.
Journal of Applied Physics
Epitaxial thin films of lanthanum-deficient LaxMnO 3-δ (0.67≤x≤1) have been grown on (100) SrTiO3 substrates by pulsed laser deposition. The as-deposited films exhibit a ferromagnetic transition at temperatures ranging from 115 to 240 K, with the transition temperature (Tc) increasing with higher La deficiency. A sharp drop in resistivity and negative magnetoresistance is observed close to Tc, a behavior similar to that observed in divalent substituted La1-xMxMnO3-δ (M=Ba, Sr, Ca, Pb) films. Postannealing the films in O2 reduces the resistivity and raises the Tc to values close to room temperature. A magnetoresistance value of 130% (Δρ/ρH) has been obtained at 300 K at 4 T for a post-annealed film with x=0.75.© 1995 American Institute of Physics.
J.L. Tholence, F. Holtzberg, et al.
Journal of Applied Physics
T.R. McGuire, S.A. Shivashankar, et al.
Journal of Applied Physics
T.R. McGuire, P.R. Duncombe, et al.
Journal of Applied Physics
A. Gupta
Physica C: Superconductivity and its applications