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Applied Physics Letters : Effects of disorder and scaling of optical conductivity in Nd0.5Ca0.5-xBaxMnO3 (x = 0 and 0.02) thin films as observed by terahertz time-domain spectroscopy

By K. R. Mavani, M. Nagai, D. S. Rana, H. Yada, I. Kawayama et al

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Book Id: WPLBN0002169207
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 11 December 2008

Title: Applied Physics Letters : Effects of disorder and scaling of optical conductivity in Nd0.5Ca0.5-xBaxMnO3 (x = 0 and 0.02) thin films as observed by terahertz time-domain spectroscopy  
Author: K. R. Mavani, M. Nagai, D. S. Rana, H. Yada, I. Kawayama et al
Volume: Issue : December 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Applied Physics Letters Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Mavani, M. Nagai, D. S. Rana, H. Yada, I. Kawayama Et A, K. R. (n.d.). Applied Physics Letters : Effects of disorder and scaling of optical conductivity in Nd0.5Ca0.5-xBaxMnO3 (x = 0 and 0.02) thin films as observed by terahertz time-domain spectroscopy. Retrieved from http://hawaiilibrary.net/


Description
Description: We have explored the low energy charge dynamics of charge-ordered Nd0.5Ca0.5MnO3 and Ba-doped Nd0.5Ca0.48Ba0.02MnO3 manganite thin films by recording the complex optical spectra using terahertz time-domain spectroscopy. The extracted frequency- and temperature-dependent optical conductivity (σ) and dielectric constant (ε1) show distinct features at Néel’s ordering and the charge-ordering temperatures (TN and TCO) . We found that the Ba-doping induced cation disorder effects on σ and ε1 are more pronounced above TCO, but these effects are subtle in a large temperature region below TCO. Both ε1 and σ increase as a function of temperature and form a scaling relationship ε1 ∞ σ.

 

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