Structure, electrical transport and magneto-resistance properties of La 5/8Ca 3/8MnO 3 manganite synthesized with different manganese precursors

M. Navasery, S. A. Halim, K. P. Lim, S. K. Chen, A. S. Roslan, Roslan Abd. Shukor

Research output: Contribution to journalArticle

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Abstract

We synthesized the polycrystalline manganite of La 5/8Ca 3/8MnO 3 with three different manganese routes prepared through a solid state reaction method. The effects of the manganese route selection on the structure, electrical transport and magneto-transport properties were examined in this study. The samples were characterized using X-ray diffraction (XRD) and SEM to identify their structure and morphology. XRD analysis confirmed that all samples were in single phase with orthorhombic structure and belonged to the Pnma space group. The average grain sized samples with manganese route of Mn 2O 3 and MnCO 3 had a grain size of 1.28.7 μm and 27.5 μm, respectively. For the MnO 2 route, the sample had a small melt-like shape with higher porosity. The metalinsulator transition temperature, T MI, for LCMO (Mn 2O 3), LCMO (MnO 2) and LCMO (MnCO 3) samples were 270 K, 266 K and 258 K, respectively. All the samples showed negative magneto-resistance with significant increase in value near the T MI temperature. The highest CMR (colossal magneto-resistance) ratio was found in LCMO (Mn 2O 3), -22.06% at 270 K, followed by -16.69% for LCMO (MnO 2) at 80 K, and 15.2% for LCMO (MnCO 3) at 100 K in a 1 T magnetic field.

Original languageEnglish
Article number1150039
JournalModern Physics Letters B
Volume26
Issue number6
DOIs
Publication statusPublished - 10 Mar 2012

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manganese
routes
diffraction
x rays
transport properties
grain size
transition temperature
solid state
porosity
scanning electron microscopy
magnetic fields
temperature

Keywords

  • grain boundary: metalinsulator transition temperature
  • Magneto-resistance
  • manganite

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics

Cite this

Structure, electrical transport and magneto-resistance properties of La 5/8Ca 3/8MnO 3 manganite synthesized with different manganese precursors. / Navasery, M.; Halim, S. A.; Lim, K. P.; Chen, S. K.; Roslan, A. S.; Abd. Shukor, Roslan.

In: Modern Physics Letters B, Vol. 26, No. 6, 1150039, 10.03.2012.

Research output: Contribution to journalArticle

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