Chemical pressure controlled colossal magnetoresistance effects in Lao0.6(Sr0.4-xCax)MnO3

R. S. Liu*, C. H. Shen, S. F. Hu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

6 引文 斯高帕斯(Scopus)

摘要

The effects of structural and paramagnetic to ferromagnetic transition with the isovalent chemical substitution of smaller Ca2+ into the bigger Sr2+ sites in Lao0.6(Sr0.4-x) 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 of the Mn-O(1) bond length and the bending of the Mn-O-Mn bond along the c-axis which corresponds to the Jahn-Teller distortion of the distoned MnO6 octahedra in the orthorhombic cell. Such effects give 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)1063-1072
頁數10
期刊International Journal of Inorganic Materials
3
發行號7
DOIs
出版狀態已發佈 - 2001
對外發佈

ASJC Scopus subject areas

  • 材料化學

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