In situ observation of the formation of FeSe

Jean-Claude Grivel; Anders Christian Wulff; Zhao Yue; Niels Hessel Andersen; J. Bednarcik; M. von  Zimmermann

doi:10.1088/0953-2048/24/1/015007

In situ observation of the formation of FeSe

Jean-Claude Grivel, Anders Christian Wulff, Zhao Yue, Niels Hessel Andersen, J. Bednarcik, M. von Zimmermann

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The formation of the FeSe compound from a mixture of Fe and Se powders encased in a composite Cu/Nb sheath was studied in situ by means of high-energy synchrotron x-ray diffraction. Tetragonal beta-FeSe does not seem to form directly from the starting elements. Instead, a sequence of FeSe2, Fe3Se4 and Fe7Se8 phases formed prior to the main formation stage of beta-FeSe at 350-370 degrees C, although a small amount of this phase appears at 250 degrees C already during a heating ramp of 2 degrees C min(-1). beta-FeSe transforms to delta-FeSe around 480 degrees C and back to beta-FeSe at 405 degrees C during cooling. There is no evidence for any interface reaction between the metal sheath and the superconducting core.

Original language	English
Journal	Superconductor Science & Technology
Volume	24
Issue number	1
Pages (from-to)	015007
ISSN	0953-2048
DOIs	https://doi.org/10.1088/0953-2048/24/1/015007
Publication status	Published - 2011

Keywords

Superconducting materials

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title = "In situ observation of the formation of FeSe",

abstract = "The formation of the FeSe compound from a mixture of Fe and Se powders encased in a composite Cu/Nb sheath was studied in situ by means of high-energy synchrotron x-ray diffraction. Tetragonal beta-FeSe does not seem to form directly from the starting elements. Instead, a sequence of FeSe2, Fe3Se4 and Fe7Se8 phases formed prior to the main formation stage of beta-FeSe at 350-370 degrees C, although a small amount of this phase appears at 250 degrees C already during a heating ramp of 2 degrees C min(-1). beta-FeSe transforms to delta-FeSe around 480 degrees C and back to beta-FeSe at 405 degrees C during cooling. There is no evidence for any interface reaction between the metal sheath and the superconducting core.",

keywords = "Superconducting materials, Superledende materialer",

author = "Jean-Claude Grivel and Wulff, {Anders Christian} and Zhao Yue and Andersen, {Niels Hessel} and J. Bednarcik and {von Zimmermann}, M.",

year = "2011",

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language = "English",

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pages = "015007",

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TY - JOUR

T1 - In situ observation of the formation of FeSe

AU - Grivel, Jean-Claude

AU - Wulff, Anders Christian

AU - Yue, Zhao

AU - Andersen, Niels Hessel

AU - Bednarcik, J.

AU - von Zimmermann, M.

PY - 2011

Y1 - 2011

N2 - The formation of the FeSe compound from a mixture of Fe and Se powders encased in a composite Cu/Nb sheath was studied in situ by means of high-energy synchrotron x-ray diffraction. Tetragonal beta-FeSe does not seem to form directly from the starting elements. Instead, a sequence of FeSe2, Fe3Se4 and Fe7Se8 phases formed prior to the main formation stage of beta-FeSe at 350-370 degrees C, although a small amount of this phase appears at 250 degrees C already during a heating ramp of 2 degrees C min(-1). beta-FeSe transforms to delta-FeSe around 480 degrees C and back to beta-FeSe at 405 degrees C during cooling. There is no evidence for any interface reaction between the metal sheath and the superconducting core.

AB - The formation of the FeSe compound from a mixture of Fe and Se powders encased in a composite Cu/Nb sheath was studied in situ by means of high-energy synchrotron x-ray diffraction. Tetragonal beta-FeSe does not seem to form directly from the starting elements. Instead, a sequence of FeSe2, Fe3Se4 and Fe7Se8 phases formed prior to the main formation stage of beta-FeSe at 350-370 degrees C, although a small amount of this phase appears at 250 degrees C already during a heating ramp of 2 degrees C min(-1). beta-FeSe transforms to delta-FeSe around 480 degrees C and back to beta-FeSe at 405 degrees C during cooling. There is no evidence for any interface reaction between the metal sheath and the superconducting core.

KW - Superconducting materials

KW - Superledende materialer

U2 - 10.1088/0953-2048/24/1/015007

DO - 10.1088/0953-2048/24/1/015007

M3 - Journal article

VL - 24

SP - 015007

JO - Superconductor Science & Technology

JF - Superconductor Science & Technology

SN - 0953-2048

IS - 1

ER -