TY - JOUR
T1 - The effects of film-substrate mismatch on Pr0.7Ca0.3 MnO3thin films
AU - Maclaren, I.
AU - Wang, Z. L.
AU - Wang, H. S.
AU - Li, Q.
N1 - Funding Information:
We wish to thank Professor K. H. Kuo for helpful discussions and support during the course of this work. The help of Mrs F. L. Wang in the preparation of TEM specimens is gratefully acknowledged. The work at the Beijing Laboratory of Electron Microscopy was performed with financial support from the National Natural Science Foundation of China, and that at Pennsylvania State University was partially supported by National Science Foundation grants DMR-9876266 and DMR-9972973.
PY - 2002/5
Y1 - 2002/5
N2 - The structures of Pr0.7Ca0.3MnO3thin films on LaA1O3(001) and NdGaO3(001) substrates were investigated using transmission electron microscopy. These substrates induce a significant compressive strain and a slight tensile strain respectively on the film, and quite different microstructures were found in the two cases. Many complex tangles of dislocations were found in the film on LaAlO3and it had a two-domain structure where both domains have a [110] axis perpendicular to the film plane. The film on NdGaO3was mostly defect free, apart from occasional precipitates, which appeared to be NaCl-structure MnO3and displayed a single domain structure with the [001] axis perpendicular to the film. The difference in domain structure was explained on the grounds of misfit minimization, and the possible consequences of such a dependence of the domain structure on the substrate for the magnetic properties were discussed.
AB - The structures of Pr0.7Ca0.3MnO3thin films on LaA1O3(001) and NdGaO3(001) substrates were investigated using transmission electron microscopy. These substrates induce a significant compressive strain and a slight tensile strain respectively on the film, and quite different microstructures were found in the two cases. Many complex tangles of dislocations were found in the film on LaAlO3and it had a two-domain structure where both domains have a [110] axis perpendicular to the film plane. The film on NdGaO3was mostly defect free, apart from occasional precipitates, which appeared to be NaCl-structure MnO3and displayed a single domain structure with the [001] axis perpendicular to the film. The difference in domain structure was explained on the grounds of misfit minimization, and the possible consequences of such a dependence of the domain structure on the substrate for the magnetic properties were discussed.
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U2 - 10.1080/01418610208235679
DO - 10.1080/01418610208235679
M3 - Article
AN - SCOPUS:0037053494
SN - 0141-8610
VL - 82
SP - 1405
EP - 1417
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
IS - 7
ER -