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.
|頁（從 - 到）||26-31|
|期刊||Materials Chemistry and Physics|
|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 → …
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