Disorder Phenomena in Nd-doped (Pr1-xNdx) 0.67Ba0.33MnO3 Manganites

Huda Abdullah, S. A. Halim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Polycrystalline samples of (Pr 1-xNdx) 0.67Ba0.33MnO3 with × = 0.0, 0.167, 0.33, 0.5, 0.67, 0.833, and 1.0 have been prepared using the solid state reaction. The samples were calcined at 900°C for 12 hours, pelletized and sintered at 1300°C for 24 hours. The structures were investigated via X-ray diffraction (XRD) method. XRD patterns shiowed orthorliombic distorted perovskite structures. The scanning electron microscopy (SEM) micrographs showed the disorder of the structure in all substitutions. This influenced the value of the magnetoresistance (MR). The MR effects are measured using the four point probe technique with a magnetic field of B < IT at temperatures of 90, 100, 150, 200, 250, 270 and 300 K. Overall, the MR increased as the temperature decreased. All doping concentrations gave a small variation range (10% to 56%). The highest MR value of 56.5 % is observed at 100 K for a sample with X= 1.0. The influence of disorder on the magnetoresistance in (Pr1-× Ndx)0.67Ba0.33MnO3 manganites at low temperatures was also discussed in this paper.

Original languageEnglish
Pages (from-to)93-98
Number of pages6
JournalSains Malaysiana
Volume39
Issue number1
Publication statusPublished - Feb 2010

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disorders
x rays
diffraction patterns
substitutes
solid state
scanning electron microscopy
temperature
probes
diffraction
magnetic fields

Keywords

  • Disordered structure
  • Low-field magnetoresistance
  • Orthorhombic

ASJC Scopus subject areas

  • General

Cite this

Disorder Phenomena in Nd-doped (Pr1-xNdx) 0.67Ba0.33MnO3 Manganites. / Abdullah, Huda; Halim, S. A.

In: Sains Malaysiana, Vol. 39, No. 1, 02.2010, p. 93-98.

Research output: Contribution to journalArticle

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