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

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

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

15 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)	3117-3122
Number of pages	6
Journal	Journal of Superconductivity and Novel Magnetism
Volume	30
Issue number	11
DOIs	https://doi.org/10.1007/s10948-017-4117-2
Publication status	Published - 2017 Nov 1

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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10.1007/s10948-017-4117-2

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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.",

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AU - Fabitha, K.

AU - Ramachandra Rao, M. S.

AU - Muralidhar, M.

AU - Furutani, K.

AU - Murakami, Masato

PY - 2017/11/1

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N2 - 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.

AB - 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.

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KW - Atomic force microscopy

KW - Critical current density (J)

KW - Raman spectroscopy

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

Abstract

Keywords

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