Effect of Ag Addition on Microstructure and Raman Vibrational Modes of Bulk FeSe

K. Fabitha; M. S. Ramachandra Rao; Muralidhar Miryala; K. Furutani; Masato Murakami

doi:10.1007/s10948-017-4117-2

Effect of Ag Addition on Microstructure and Raman Vibrational Modes of Bulk FeSe

K. Fabitha, M. S. Ramachandra Rao, Muralidhar Miryala, K. Furutani, Masato Murakami

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

We have synthesized polycrystalline bulk FeSe materials with various Ag concentrations through double-sintering solid-state reaction. All the samples exhibited similar onset critical temperature of around 8 K. Atomic force microscopic observation revealed that the grain connectivity was improved through Ag addition. Raman spectroscopic studies confirmed that pristine and Ag-doped FeSe compounds have superconducting tetragonal structure with high crystalline quality. There was a clear red shift and peak broadening in Fe-related Raman modes when the Ag concentration is increased, which might be ascribed to the incorporation of Ag⁺ ions into the FeSe lattice. The critical current density decreased with Ag addition, although onset critical temperature remained constant.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Journal of Superconductivity and Novel Magnetism
DOIs	https://doi.org/10.1007/s10948-017-4117-2
Publication status	Accepted/In press - 2017 Apr 27

Keywords

Ag-added FeSe
Atomic force microscopy
Critical current density (J)
Raman spectroscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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AU - Ramachandra Rao, M. S.

AU - Miryala, Muralidhar

AU - Furutani, K.

AU - Murakami, Masato

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