Raman active phonons in RMnO3 (R=La, Pr, Nd, Sm) manganites

Wei-Ran Wang; Geng-Xin Song; Yan Zhao; Xue-Ying Han

doi:10.1117/12.830999

21 May 2009 Raman active phonons in RMnO₃ (R=La, Pr, Nd, Sm) manganites

Wei-Ran Wang, Geng-Xin Song, Yan Zhao, Xue-Ying Han

Proceedings Volume 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 72822R (2009) https://doi.org/10.1117/12.830999
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

Abstract

RMnO₃ (R=La, Pr, Nd, Sm) Manganites prepared using solid-state reaction method were examined by Raman spectroscopy. Raman-active phonons in orthorhombic perovskitelike RMnO₃ were studied by measuring Raman spectra in various scattering configurations. The experimental Raman line wave numbers and the expected shapes for the phonon modes were compared to those reported for other perovskitelike compounds with Pnma structure and to the results of lattice dynamical calculations. The observed Raman lines in the spectra of RMnO₃ were assigned to definite atomic motions. The remaining spectral weight can be explained by the presence of dynamic John-Teller distortions that lower the symmetry of the cubic perovskite. It is clear that Raman spectroscopy has the advantage of being very sensitive to structure distortion and oxygen motion.

Citation Download Citation

Wei-Ran Wang, Geng-Xin Song, Yan Zhao, and Xue-Ying Han "Raman active phonons in RMnO₃ (R=La, Pr, Nd, Sm) manganites", Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 72822R (21 May 2009); https://doi.org/10.1117/12.830999

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available