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

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

doi:10.1063/1.4710278

Control of interstitial Fe and its impact on superconductivity of FeTe _1/2Se_1/2

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The FeTe_1/2Se_1/2 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 (T_mag) is observed at around 125 K for all the samples. The prominence of T_mag 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 Fe_int in FeTe_1/2Se_1/2 and thus both its superconducting and magnetic properties.

Original language	English
Title of host publication	Solid State Physics - Proceedings of the 56th DAE Solid State Physics Symposium 2011
Pages	869-870
Number of pages	2
Edition	1
DOIs	https://doi.org/10.1063/1.4710278
Publication status	Published - 2012
Event	56th DAE Solid State Physics Symposium 2011 - Kattankulathur, Tamilnadu, India Duration: 19-12-2011 → 23-12-2011

Publication series

Name	AIP Conference Proceedings
Number	1
Volume	1447
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	56th DAE Solid State Physics Symposium 2011
Country/Territory	India
City	Kattankulathur, Tamilnadu
Period	19-12-11 → 23-12-11

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1063/1.4710278

Cite this

@inproceedings{4810fc04a6034a1bb7adeae78bdf1c8f,

title = "Control of interstitial Fe and its impact on superconductivity of FeTe 1/2Se1/2",

abstract = "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.",

author = "Awana, {V. P.S.} and Anuj Kumar and Anand Pal",

year = "2012",

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series = "AIP Conference Proceedings",

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note = "56th DAE Solid State Physics Symposium 2011 ; Conference date: 19-12-2011 Through 23-12-2011",

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Awana, VPS, Kumar, A & Pal, A 2012, Control of interstitial Fe and its impact on superconductivity of FeTe _1/2Se_1/2. in Solid State Physics - Proceedings of the 56th DAE Solid State Physics Symposium 2011. 1 edn, AIP Conference Proceedings, no. 1, vol. 1447, pp. 869-870, 56th DAE Solid State Physics Symposium 2011, Kattankulathur, Tamilnadu, India, 19-12-11. https://doi.org/10.1063/1.4710278

Control of interstitial Fe and its impact on superconductivity of FeTe _1/2Se_1/2. / Awana, V. P.S.; Kumar, Anuj; Pal, Anand.
Solid State Physics - Proceedings of the 56th DAE Solid State Physics Symposium 2011. 1. ed. 2012. p. 869-870 (AIP Conference Proceedings; Vol. 1447, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - 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.

AB - 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.

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