TY - JOUR
T1 - Effect of Ag Addition on Microstructure and Raman Vibrational Modes of Bulk FeSe
AU - Fabitha, K.
AU - Ramachandra Rao, M. S.
AU - Muralidhar, M.
AU - Furutani, K.
AU - Murakami, M.
N1 - Publisher Copyright:
© 2017, Springer Science+Business Media New York.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017/11/1
Y1 - 2017/11/1
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.
KW - Ag-added FeSe
KW - Atomic force microscopy
KW - Critical current density (J)
KW - Raman spectroscopy
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U2 - 10.1007/s10948-017-4117-2
DO - 10.1007/s10948-017-4117-2
M3 - Article
AN - SCOPUS:85018306823
VL - 30
SP - 3117
EP - 3122
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
SN - 1557-1939
IS - 11
ER -