Electron doping effect on structural and magnetic phase transitions in Sr2-xNdxFeMoO6 double perovskites

A. K. Azad, S. -G. Enksson, Abdullah Khan, A. Eriksson, M. Tseggai

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Polycrystalline Sr2-xNdxFeMoO6 (x = 0.0 0.1. 0.2. 0.4) materials have been synthesized by a citrate co-precipitation method and studied by neutron powder diffraction (NPD) and magnetization measurements. Rietveld analysis of the temperature-dependent NPD data shows that the compounds (x = 0.0 0.1, 0.2) crystallize in the tetragonal symmetry in the range 10-400 K and converts to cubic symmetry above 450 K. The unit cell volume increases with increasing Nd3+ concentration, which is in electronic effect in order to change the valence state of the B-site cations. Antisite defects at the Fe-Mo sublattice increases with the Nd3+ doping. The Curie temperature was increased from 430 K for x = 0 to 443 K for x = 0.4. The magnetic moment of the Fe-site decreases while the Mo-site moment increases with electron doping. The antiferromagnetic arrangement causes the system to show a net ferrimagnetic moment. (C) 2006 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)1303-1311
Number of pages9
JournalJournal of Solid State Chemistry
Volume179
DOIs
Publication statusPublished - May 2006

Keywords

  • double perovskite
  • nuclear structure
  • magnetic structure
  • electron doping
  • neutron diffraction
  • magnetization measurement
  • CMR materials
  • ROOM-TEMPERATURE
  • CURIE-TEMPERATURE
  • MAGNETORESISTANCE
  • SR2FEMOO6
  • BA
  • A(2)FEMOO(6)
  • POLYCRYSTALS
  • FIELD
  • A=CA
  • SR

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