Variation of physical properties in the nominal Sr4V 2O6Fe2As2

Athena S. Sefat; David J. Singh; V. Ovidiu Garlea; Yuri L. Zuev; Michael A. McGuire; Brian C. Sales

doi:10.1016/j.physc.2011.01.004

Variation of physical properties in the nominal Sr₄V ₂O₆Fe₂As₂

Athena S. Sefat
, David J. Singh
, V. Ovidiu Garlea
, Yuri L. Zuev
, Michael A. McGuire
, Brian C. Sales

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

19 Scopus citations

Abstract

We show using a combination of powder X-ray and neutron diffraction, first-principles calculations, temperature- and field-dependent magnetization, heat capacity and resistivity data that the superconducting behavior of 'Sr ₄V₂O₆Fe₂As₂' is dependent on synthesis conditions, particularly, heating profiles result in unintentional chemical doping. This compound can be tuned from a state in which the vanadium electrons are itinerant with a high electronic density of states, to a state where the vanadium-oxide layers are insulating and presumably magnetic.

Original language	English
Pages (from-to)	143-149
Number of pages	7
Journal	Physica C: Superconductivity and its Applications
Volume	471
Issue number	5-6
DOIs	https://doi.org/10.1016/j.physc.2011.01.004
State	Published - Mar 2011

Funding

Research at ORNL is sponsored by the Materials Sciences and Engineering Division, Office of Basic Energy Sciences, US Department of Energy. We are grateful to Lindsay VanBebber at Department of Materials Science and Engineering, University of Tennessee, for her assistance in materials preparations. We acknowledge discussions with D.K. Christen, and V. Keppens and D. Mandrus for technical support. The work at High Flux Reactor (ORNL) was sponsored by the Scientific User Facilities Division, Office of Basic Sciences, US DOE.

Keywords

Fe-based superconductors
Neutrons
Oxides

Access to Document

10.1016/j.physc.2011.01.004

Cite this

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title = "Variation of physical properties in the nominal Sr4V 2O6Fe2As2",

abstract = "We show using a combination of powder X-ray and neutron diffraction, first-principles calculations, temperature- and field-dependent magnetization, heat capacity and resistivity data that the superconducting behavior of 'Sr 4V2O6Fe2As2' is dependent on synthesis conditions, particularly, heating profiles result in unintentional chemical doping. This compound can be tuned from a state in which the vanadium electrons are itinerant with a high electronic density of states, to a state where the vanadium-oxide layers are insulating and presumably magnetic.",

keywords = "Fe-based superconductors, Neutrons, Oxides",

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AU - Sefat, Athena S.

AU - Singh, David J.

AU - Ovidiu Garlea, V.

AU - Zuev, Yuri L.

AU - McGuire, Michael A.

AU - Sales, Brian C.

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N2 - We show using a combination of powder X-ray and neutron diffraction, first-principles calculations, temperature- and field-dependent magnetization, heat capacity and resistivity data that the superconducting behavior of 'Sr 4V2O6Fe2As2' is dependent on synthesis conditions, particularly, heating profiles result in unintentional chemical doping. This compound can be tuned from a state in which the vanadium electrons are itinerant with a high electronic density of states, to a state where the vanadium-oxide layers are insulating and presumably magnetic.

AB - We show using a combination of powder X-ray and neutron diffraction, first-principles calculations, temperature- and field-dependent magnetization, heat capacity and resistivity data that the superconducting behavior of 'Sr 4V2O6Fe2As2' is dependent on synthesis conditions, particularly, heating profiles result in unintentional chemical doping. This compound can be tuned from a state in which the vanadium electrons are itinerant with a high electronic density of states, to a state where the vanadium-oxide layers are insulating and presumably magnetic.

KW - Fe-based superconductors

KW - Neutrons

KW - Oxides

UR - https://www.scopus.com/pages/publications/79751529062

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DO - 10.1016/j.physc.2011.01.004

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