摘要
In the present work we use Raman microscopy to investigate the size effect of spin-phonon coupling in antiferromagnetic Cr 2O 3 nanoparticles. The peculiarities of the dependency of the phonon wave number on temperature (with a relatively weak peak at 293 cm-1) can be attributed to the spin-phonon coupling. The variation with temperature of the spin-phonon mode develops when the antiferromagnetic state is near the ordering temperature of the Cr spins. The observations can be reasonably well interpreted by describing the order parameter. A shift in frequency is caused by a strong spin-phonon interaction in Cr 2O 3. The obtained s-ph coefficients are found to be consistent with the strain, where raising the strain results in weakening of the s-ph coupling.
原文 | ???core.languages.en_GB??? |
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頁(從 - 到) | 4596-4601 |
頁數 | 6 |
期刊 | Journal of Nanoscience and Nanotechnology |
卷 | 10 |
發行號 | 7 |
DOIs | |
出版狀態 | 已出版 - 7月 2010 |