Cation ordering structure in La0.8Ca0.2MnO3 thin films by pulsed laser deposition

Publication Type:

Conference Paper

Authors:

Y.H. Li; M. Rajeswari; A. Biswasl; D.J. Kang; C. Sehmen; L. Salamanca-Riba; Ramamoorthy Ramesh; T. Venkatesan

Source:

Materials Research Society Symposium - Proceedings, Volume 602, p.81-86 (2000)

Keywords:

Cation ordered structures, crystal structure, lanthanum compounds, Positive ions, pulsed laser deposition, thin films, transmission electron microscopy

Abstract:

A careful analysis of high-resolution transmission electron microscopy images from La0.8Ca0.2MnO3 thin films indicates that the images can not explained based on either the classical Pnma structure or its monoclinic distortion. A cation ordered structure is proposed which could be responsible for the significantly higher Tc of the film (298K) compared with the bulk material of the same composition (190K).

Notes:

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