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 - Funding Information:
The paper was supported by the Japan Student Services Organization (JASSO), Shibaura Institute of Technology (SIT), under the Top Global University Project, designed by the Ministry of Education, Culture, Sports, Science and Technology of Japan.
Publisher Copyright:
© 2017, Springer Science+Business Media New York.
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 -