Chemical pressure control of Curie temperature in La0.6(Ba0.4-xCax)MnO3

R. S. Liu, C. H. Shen, S. F. Hu, J. M. Chen

Research output: Contribution to journalConference article

7 Citations (Scopus)

Abstract

The effects on structural and paramagnetic to ferromagnetic transitions by isovalent chemical substitution of smaller Ca2+ into the bigger Ba2+ sites in La0.6(Ba0.4-xCax)MnO3 (0 ≤ x ≤ 0.4) are investigated. With increasing x, a change from the rhombohedral cell (space group: R-3c) to an orthorhombic cell (space group: Pbnm) is observed. For x ≥ 0.3, the structural transformation leads to an increase in the Mn-O(1) bond length along the c-axis which corresponds to the Jahn-Teller distortion of the distorted MnO6 octahedra in the orthorhombic cell. This effect gives rise to a decrease in TC (the temperature of the paramagnetic to ferromagnetic transition) with increasing Ca content.

Original languageEnglish
Pages (from-to)26-31
Number of pages6
JournalMaterials Chemistry and Physics
Volume75
Issue number1-3
DOIs
Publication statusPublished - 2002 Apr 28
EventICMAT 2001 Symposium C (Novel and Advanced Ceramics) - Singapore, Singapore
Duration: 2002 Apr 28 → …

Keywords

  • Chemical substitution
  • Colossal magnetoresistance
  • Curie temperature
  • Magnetic
  • Manganites

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Chemical pressure control of Curie temperature in La<sub>0.6</sub>(Ba<sub>0.4-x</sub>Ca<sub>x</sub>)MnO<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this