Ma Yanwei~(1,2*), Guilloux Viry M~2, Barahona P~2, Pea~2 O, Moure C~3(1.Applied Superconductivity Laboratory, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, China; 2.Chimie du Solide et Inorganique Moléculaire, UMR 6511, CNRS - Université de Rennes 1, Institut de Chimie de Rennes, 35042 Rennes, France; 3.Instituto de Ceramica y Vidrio, CSIC, Campus de Cantoblanco, 28049 Madrid, Spain)
Gd_(0.67)Ca_(0.33)MnO_3(GCMO)thin films grown by laser ablation on SrTiO_3(100)(STO)substrates was studied. Films are highly crystallized, very well epitaxial and single-phased. The ordering magnetic temperature(T_c)of the films is much higher than the value of bulk samples of similar composition. It is found that the GCMO film exhibits a reversal of its magnetization at low temperature when cooled under a magnetic field. The negative magnetization is a consequence of the rapid increase(～1/T)with decreasing temperature of the magnetization of a sublattice aligned antiparallel to the local field, relative to the magnetic contribution of a second sublattice which is aligned parallel to the applied field.
pulsed laser deposition;Gd_(0.67)Ca_(0.33)MnO_3;thin films;magnetic properties
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