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

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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)3117-3122
Number of pages6
JournalJournal of Superconductivity and Novel Magnetism
Volume30
Issue number11
DOIs
Publication statusPublished - 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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