Title of article :
A-site substitution effects on the magnetic and transport properties in La1.4−zYzSr1.6−yBayMn2O7
Author/Authors :
Yu، نويسنده , , G.Q. and Yuan، نويسنده , , S.L. and REN، نويسنده , , G.M. and Xiao، نويسنده , , X. and Miao، نويسنده , , J.H. and Wang، نويسنده , , Y.Q. and Yin، نويسنده , , S.Y. and Liu، نويسنده , , L.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
The magnetic and transport properties of bilayer manganites La1.4−zYzSr1.6−yBayMn2O7 (z = 0, 0.05; y = 0, 0.05) have been investigated. Doping reduces the magnetization and conductance, and shifts magnetic transition temperature and insulator–metal transition temperature to lower temperature. Different changes of magnetic and transport behaviors among Y doping (y = 0; z = 0.05), Ba doping (y = 0.05; z = 0) and Y and Ba co-doping (y = z = 0.05) are observed. These results can be explained by considering A-site ionic size mismatch, the orbital character of eg electrons, and the Y and Ba preferential occupancy.
Keywords :
bilayer manganites , Size mismatch , Magnetic properties , electrical transport
Journal title :
MATERIALS SCIENCE & ENGINEERING: B
Journal title :
MATERIALS SCIENCE & ENGINEERING: B
