Back to Search
Start Over
Mössbauer study of temperature-dependent cycloidal ordering in BiFeO3 nanoparticles.
- Source :
-
Nano letters [Nano Lett] 2014 Nov 12; Vol. 14 (11), pp. 6061-5. Date of Electronic Publication: 2014 Oct 16. - Publication Year :
- 2014
-
Abstract
- To study the effects of different temperatures and particle sizes on the anharmonic cycloidal spin structure in BiFeO3 nanoparticles, Mössbauer spectroscopy was applied to three sets of particles with different mean diameters in the range of 54 nm to 1.6 μm at temperatures between 4.2 and 800 K. The paramagnetic transition showed a distinct broadening upon decreasing particle size with Néel temperatures decreasing from 652 to 631 K. The anharmonicity of the long-range cycloidal structure, calculated from experimental Mössbauer spectra, is revealed to decrease upon rising temperature, starting at 150-200 K and reaching the harmonic state at about 400 K.
Details
- Language :
- English
- ISSN :
- 1530-6992
- Volume :
- 14
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Nano letters
- Publication Type :
- Academic Journal
- Accession number :
- 25310004
- Full Text :
- https://doi.org/10.1021/nl5031375