Effects of annealing, acid and alcoholic beverages on Fe 1+yTe0.6Se0.4

Y. Sun; T. Taen; Y. Tsuchiya; Z. X. Shi; T. Tamegai

doi:10.1088/0953-2048/26/1/015015

Effects of annealing, acid and alcoholic beverages on Fe ₁+yTe_0.6Se_0.4

Y. Sun, T. Taen, Y. Tsuchiya, Z. X. Shi, T. Tamegai

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

We have systematically investigated and compared different methods to induce superconductivity in the iron chalcogenide Fe₁+yTe _0.6Se_0.4, including annealing in a vacuum, N₂, O₂ and I₂ atmospheres and immersing samples into acid and alcoholic beverages. Vacuum and N₂ annealing are proved to be ineffective in inducing superconductivity in a Fe₁+yTe _0.6Se_0.4 single crystal. Annealing in O₂ and I₂ and immersion in acid and alcoholic beverages can induce superconductivity by oxidizing the excess Fe in the sample. Superconductivity in O₂ annealed samples is of a bulk nature, while I₂, acid and alcoholic beverages can only induce superconductivity near the surface. By comparing the different effects of O₂, I₂, acid and alcoholic beverages we propose a scenario to explain how the superconductivity is induced in the non-superconducting as-grown Fe₁+yTe _0.6Se_0.4.

Original language	English
Article number	015015
Journal	Superconductor Science and Technology
Volume	26
Issue number	1
DOIs	https://doi.org/10.1088/0953-2048/26/1/015015
Publication status	Published - 2013 Jan
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "Effects of annealing, acid and alcoholic beverages on Fe 1+yTe0.6Se0.4",

abstract = "We have systematically investigated and compared different methods to induce superconductivity in the iron chalcogenide Fe1+yTe 0.6Se0.4, including annealing in a vacuum, N2, O2 and I2 atmospheres and immersing samples into acid and alcoholic beverages. Vacuum and N2 annealing are proved to be ineffective in inducing superconductivity in a Fe1+yTe 0.6Se0.4 single crystal. Annealing in O2 and I2 and immersion in acid and alcoholic beverages can induce superconductivity by oxidizing the excess Fe in the sample. Superconductivity in O2 annealed samples is of a bulk nature, while I2, acid and alcoholic beverages can only induce superconductivity near the surface. By comparing the different effects of O2, I2, acid and alcoholic beverages we propose a scenario to explain how the superconductivity is induced in the non-superconducting as-grown Fe1+yTe 0.6Se0.4.",

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AU - Taen, T.

AU - Tsuchiya, Y.

AU - Shi, Z. X.

AU - Tamegai, T.

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N2 - We have systematically investigated and compared different methods to induce superconductivity in the iron chalcogenide Fe1+yTe 0.6Se0.4, including annealing in a vacuum, N2, O2 and I2 atmospheres and immersing samples into acid and alcoholic beverages. Vacuum and N2 annealing are proved to be ineffective in inducing superconductivity in a Fe1+yTe 0.6Se0.4 single crystal. Annealing in O2 and I2 and immersion in acid and alcoholic beverages can induce superconductivity by oxidizing the excess Fe in the sample. Superconductivity in O2 annealed samples is of a bulk nature, while I2, acid and alcoholic beverages can only induce superconductivity near the surface. By comparing the different effects of O2, I2, acid and alcoholic beverages we propose a scenario to explain how the superconductivity is induced in the non-superconducting as-grown Fe1+yTe 0.6Se0.4.

AB - We have systematically investigated and compared different methods to induce superconductivity in the iron chalcogenide Fe1+yTe 0.6Se0.4, including annealing in a vacuum, N2, O2 and I2 atmospheres and immersing samples into acid and alcoholic beverages. Vacuum and N2 annealing are proved to be ineffective in inducing superconductivity in a Fe1+yTe 0.6Se0.4 single crystal. Annealing in O2 and I2 and immersion in acid and alcoholic beverages can induce superconductivity by oxidizing the excess Fe in the sample. Superconductivity in O2 annealed samples is of a bulk nature, while I2, acid and alcoholic beverages can only induce superconductivity near the surface. By comparing the different effects of O2, I2, acid and alcoholic beverages we propose a scenario to explain how the superconductivity is induced in the non-superconducting as-grown Fe1+yTe 0.6Se0.4.

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Effects of annealing, acid and alcoholic beverages on Fe ₁+yTe_0.6Se_0.4

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