Epitaxial Growth of Gd_(0.67)Ca_(0.33)MnO_3 Thin Films by Laser Ablation  

作　　者：马衍伟 Guilloux Viry M Barahona P Pea O Moure C 

机构地区：[1]Applied Superconductivity Laboratory, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, China Chimie du Solide et Inorganique Moléculaire, UMR 6511, CNRS - Université de Rennes 1, Institut de Chimie de Rennes, 35042 Rennes, France [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

出　　处：《Journal of Rare Earths》2004年第6期739-742,共4页稀土学报（英文版）

基　　金：ProjectsuppurtedbyRegionBretagn ;France

摘　　要：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.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.

关 键 词：pulsed laser deposition Gd_(0.67)Ca_(0.33)MnO_3 thin films magnetic properties 

分 类 号：O614[理学—无机化学]