Chemical pressure control of Curie temperature in La0.6(Ba0.4−xCax)MnO3
In: http://www.sciencedirect.com/, 2002
Online
academicJournal
Zugriff:
The effects on structural & 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.
| Titel: |
Chemical pressure control of Curie temperature in La0.6(Ba0.4−xCax)MnO3
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| Autor/in / Beteiligte Person: | Liu, R.S. ; Shen, C.H. ; Hu, S.F. ; Chen, J.M. ; National Taiwan University Dept Phys |
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| Zeitschrift: | http://www.sciencedirect.com/, 2002 |
| Veröffentlichung: | National Taiwan University Dept Phys, 2002 |
| Medientyp: | academicJournal |
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