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Title | Double Peak Behavior of Resistivity-Temperature Curves in (Nd / Pr)0.67Sr0.33MnO3 Manganites |
Authors |
Bharat Singh,
Naresh Kumar, Masroor Ahmad Bhat, Rajneesh Mohan, Bhattacharya, S. Gaur, N.K. |
ORCID | |
Keywords |
Manganites Solid state reaction route XRD RT behaviour and SEM |
Type | Article |
Date of Issue | 2014 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/35965 |
Publisher | Sumy State University |
License | |
Citation | Bharat Singh, Naresh Kumar, Masroor Ahmad Bhat, et al., J. Nano- Electron. Phys. 6 No 2, 02005 (2014) |
Abstract |
We have reported the synthesis of polycrystalline samples of R0.67Sr0.33MnO3 (R Pr, Nd) from the precursors
of PrMnO3, NdMnO3 and SrMnO3 by using solid state reaction method. These samples were sintered
at 1200 °C and 1400 °C. Some of samples were also undergone oxygen annealing at 950 °C for 6 h. All
the synthesized samples were characterized by X-Ray diffraction (XRD) technique, scanning electron microscopy
(SEM) and low temperature resistivity versus temperature (R-T) measurement. The XRD patterns
show the monophasic nature of the sintered and annealed samples. The sintered samples of
Nd0.67Sr0.33MnO3 has metal- insulator transition at 250 K, while the sample annealed in oxygen shows two
peaks, one sharp peak at 250 K and other broad peak at 200 K. The sintered samples of Pr0.67Sr0.33MnO3
has only one peak at 290 K, while the sample annealed in oxygen shows two peaks, one sharp peak at 290
K and another broad peak at 225 K. The two peak behavior in the annealed samples has been explained by
inhomogeneous diffusion of oxygen in the core of the grain and at the grain boundaries region
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35965 |
Appears in Collections: |
Журнал нано- та електронної фізики (Journal of nano- and electronic physics) |
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China
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Finland
1
Germany
2
India
101867981
Ireland
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130708
Russia
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Double Peak Behavior of Resistivity-Temperature.pdf | 327,65 kB | Adobe PDF | 1878006027 |
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