Accession Number:

ADP012293

Title:

Studies on Crystal Structure and Magnetic Scaling Behavior of Perovskite-Like (La(1-x)Pb(x)MnO3 System with x = 0 - 0.5

Descriptive Note:

Conference proceedings

Corporate Author:

CHUNG CHENG UNIV CHIAYI (TAIWAN) DEPT OF PHYSICS

Report Date:

2001-04-01

Pagination or Media Count:

6.0

Abstract:

The magnetic critical behaviors in the perovskite-like La1-xPbxMnO3 series with x 0.0 0.5 are studied by means of dc magnetic measurements. All the samples crystallize in the rhombohedral unit cell with a R 3 C space group alpha 0.54 nm and C 1.33 nm. The detailed crystallographic parameters of all the samples are obtained by the refinements of the powder x-ray diffraction data using the Rietveld method. The substitution effect of Pb2 ions on La3 sites induces a mixed-valence state of Mn3Mn4 and enhances magnetic transition temperature in the La1-xPbxMnO3 system. The transition temperature Tsub c increases with the Pb content from 225 K as x 0 to 355 K as x 0.5. The canonical spin-glass behaviors in low fields and the scaling behaviors of magnetic physical quantities are clearly observed in all our samples. The values of the related critical exponents and the scaling functions of magnetic data are close to those of the conventional spin glass systems.

Subject Categories:

  • Properties of Metals and Alloys
  • Electricity and Magnetism
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE