Superconductivity in PbO-type tetragonal FeSe nanoparticles

Chung Chieh Chang, Chih Han Wang, Min Hsueh Wen, Yu Ruei Wu, Yao Tsung Hsieh, Maw Kuen Wu

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The existence of a high-temperature superconducting phase with Tc∼40 K in PbO-type tetragonal β-FeSe has been demonstrated by application of high pressure. We have used a rapid, solvent-less reaction under autogenic pressure at elevated temperature (RAPET) process to synthesize superconducting FeSe nanoparticles. The nanoparticles obtained are mainly the superconducting β-FeSe phase. Detailed magnetization measurements on these nanoparticles show that in addition to the superconducting transition at ∼10 K, we observe an anomaly in magnetic susceptibility measurements suggesting the presence of a superconducting transition at ∼30 K in the synthesized nanoparticles. The superconducting volume fraction depends on the chemical composition of the starting materials and also on the processing time.

Original languageEnglish
Pages (from-to)649-652
Number of pages4
JournalSolid State Communications
Issue number8
Publication statusPublished - Apr 2012
Externally publishedYes


  • β-FeSe superconductor
  • High pressure
  • Nanoparticle
  • Reaction under autogenic pressure at elevated temperature (RAPET) process

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry


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