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- Title
Microstructural characterization of nanosized YMnO<sub>3</sub> powders: the size effect.
- Authors
Zhang, M.F.; Liu, J.-M.; Liu, Z.G.
- Abstract
Nanosized YMnO3 powders of grain size below 100 nm were prepared and characterized by various techniques to understand the size effect of the microstructures and the stoichiometry of the as-prepared powders. It is revealed that the grain surface oxidization state depends on grain size, with a lower oxidization state for the smaller grains. Raman and infrared spectroscopy studies show a remarkable broadening of the reflection peaks with decreasing grain size, identifying the significant surface structure relaxation effect for small-size powders. The ferromagnetic–antiferromagnetic transition around 65–68 °C is determined by the specific-heat measurement, also indicating the remarkable size dependence.
- Subjects
NANOCRYSTALS; MICROSTRUCTURE; STOICHIOMETRY; INFRARED spectroscopy; FERROMAGNETISM; SPECTRUM analysis
- Publication
Applied Physics A: Materials Science & Processing, 2004, Vol 79, Issue 7, p1753
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-004-2901-x