Kumar, Satyam and Dwivedi, G. D. and Kumar, Shiv and Mathur, R. B. and Saxena, U. and Ghosh, A. K. and Joshi, Amish G. and Yang, H. D. and Chatterjee, Sandip (2015) Structural, transport and optical properties of (La0.6Pr0.4)(0.65)Ca0.35MnO3 nanocrystals: a wide band-gap magnetic semiconductor. Dalton Transactions, 44 (7). 3109-3117. ISSN 1477-9226
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Abstract
(La0.6Pr0.4)(0.65)Ca0.35MnO3 system has been synthesized via a sol-gel route at different sintering temperatures. Structural, transport and optical measurements have been carried out to investigate (La0.6Pr0.4)(0.65)Ca0.35MnO3 nanoparticles. Raman spectra show that Jahn-Teller distortion has been decreased due to the presence of Ca and Pr in A-site. Magnetic measurements provide a Curie temperature around 200 K and saturation magnetization (MS) of about 3.43 mu(B)/Mn at 5 K. X-ray photoemission spectroscopy study suggests that Mn exists in a dual oxidation state (Mn3+ and Mn4+). Resistivity measurements suggest that charge-ordered states of Mn3+ and Mn4+, which might be influenced by the presence of Pr, have enhanced insulating behavior in (La0.6Pr0.4)(0.65)Ca0.35MnO3. Band gap estimated from UV-Vis spectroscopy measurements comes in the range of wide band gap semiconductors (similar to 3.5 eV); this makes (La0.6Pr0.4)(0.65)Ca0.35MnO3 a potential candidate for device application.
| Item Type: | Article |
|---|---|
| Subjects: | Chemistry > Inorganic Chemistry Chemistry > Nuclear Chemistry |
| Divisions: | UNSPECIFIED |
| Depositing User: | Dr. Rajpal Walke |
| Date Deposited: | 20 Oct 2016 11:48 |
| Last Modified: | 20 Oct 2016 11:48 |
| URI: | http://npl.csircentral.net/id/eprint/2007 |
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