Chemical control of colossal magnetoresistance in manganites

Chih Hung Shen, Ru Shi Liu*, Ravi Gundakaram, Shu Fen Hu, Jauyn Grace Lin, Chao Yuan Huang, Chien Min Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The evolution of the structural, electrical and magnetic properties with the isovalent chemical substitution of Ca2+ into the Sr2+ sites in the new series of two-dimensional La1.2(Sr1.8-xCax)Mn2 O7 samples (0 ≤ x ≤ 0.8) and three-dimensional La0.6(Sr0.4-xCax)MnO3 samples (0 ≤ x ≤ 0.4) has been investigated. The compositional dependence of the structural variation has been found in La0.6(Sr0.4-xCax)MnO3. The Curie temperatures (TC) decreased from 135 to 102K and 370 to 270K for x = 0-0.4 in La1.2(Sr1.8-xCax)Mn2 O7 and La0.6(Sr0.4-xCax)MnO3, respectively. Our results confirm that the dimensionality as well as ionic size plays an important role in controlling the colossal magnetoresistance in manganites.

Original languageEnglish
Pages (from-to)281-285
Number of pages5
JournalMaterials Chemistry and Physics
Issue number2
Publication statusPublished - 2001 Nov 1
Externally publishedYes


  • Magnetic structure
  • Magnetometer
  • TEM
  • XRD

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics


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