Title of article :
Synthesis and characterization of the colossal magnetoresistance manganite La1.2(Sr1.4Ca0.4)Mn2O7 by citrate gel
Author/Authors :
Chen، نويسنده , , C.C. and Shen، نويسنده , , C.H. and Liu، نويسنده , , R.S. and Lin، نويسنده , , J.G. and Huang، نويسنده , , C.Y.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Abstract :
Single-phase La1.2(Sr1.4Ca0.4)Mn2O7 has been synthesized from the aqueous solution of metal nitrates and citric acid by the sol–gel technique. Small particle size with high homogeneity of the powder was obtained. The valence of Mn is determined to be 3.45±0.05 by chemical titration. The MR ratio [ρ−ρ(H)]/ρ(H), is 115% (102 K, 1.5 T) for the composition prepared by the citrate route, and is nearly three times larger than that of the sample prepared by solid state reaction.
Keywords :
A. Inorganic compounds , A. Oxides , A. Magnetic materials , D. Crystal structure
Journal title :
Materials Research Bulletin
Journal title :
Materials Research Bulletin
