Control of interstitial Fe and its impact on superconductivity of FeTe 1/2Se1/2

V. P.S. Awana, Anuj Kumar, Anand Pal

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The FeTe1/2Se1/2 samples are quenched during the vacuum sealed synthesis process to room temperature from 700°C, 500°C, 300°C and room temperature (RT); named as 700Q, 500Q, 300Q and RTQ respectively. Though all samples except 700Q are crystallized in single phase with space group P4/nmm, the presence of interstitial Fe (Feint) at 2c site is increased from 5% for RTQ to 8% for 500Q. The 700Q sample is crystallized in Fe7Se8 phase. Also though the RTQ and 300Q are superconducting at 10 K and 13 K respectively, the 500Q and 700Q are not. Magnetic ordering (Tmag) is observed at around 125 K for all the samples. The prominence of Tmag in terms of effective moment is sufficiently higher for 500Q and 700Q than RTQ and 300Q. Summarily, it is found that quenching induced disorder affects the occupancy of Feint in FeTe1/2Se1/2 and thus both its superconducting and magnetic properties.

Original languageEnglish
Title of host publicationSolid State Physics - Proceedings of the 56th DAE Solid State Physics Symposium 2011
Number of pages2
Publication statusPublished - 2012
Event56th DAE Solid State Physics Symposium 2011 - Kattankulathur, Tamilnadu, India
Duration: 19-12-201123-12-2011

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference56th DAE Solid State Physics Symposium 2011
CityKattankulathur, Tamilnadu

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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