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

研究成果: 雜誌貢獻會議論文同行評審

7 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)26-31
頁數6
期刊Materials Chemistry and Physics
75
發行號1-3
DOIs
出版狀態已發佈 - 2002 四月 28
事件ICMAT 2001 Symposium C (Novel and Advanced Ceramics) - Singapore, 新加坡
持續時間: 2002 四月 28 → …

ASJC Scopus subject areas

  • 材料科學(全部)
  • 凝聚態物理學

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