Local environments of iron and cobalt in doped MgB2 superconductors

Ernö Kuzmann; Z. Homonnay; Z. Klencsár; Markus Kühberger; A. Vertes; Gerhard Gritzner

doi:10.1088/0953-2048/15/11/301

Local environments of iron and cobalt in doped MgB2 superconductors

Ernö Kuzmann, Z. Homonnay, Z. Klencsár, Markus Kühberger, A. Vertes, Gerhard Gritzner

Institute of Chemical Technology of Inorganic Materials

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

Abstract

MgB2 has been doped with 57Fe and 57Co in order to probe the electronic structure of the superconductor by Mössbauer spectroscopy. Simultaneous SEM-EDX studies showed that both Fe and Co were incorporated to some extent into the MgB2 host lattice. Mössbauer spectroscopy indicated that Fe2B and FeB were also formed during the preparation. At higher Fe-contents Fe2B appeared unambiguously as a secondary phase in the X-ray diffraction. CoB was detected at substitution levels of 10 mol-% and greater. Both Fe and Co doping decreased the Tc(0) modestly. Co and Fe were found to substitute at the Mg site in the MgB2 lattice. The Mössbauer parameters for 57Co and 57Fe were consistent with a metallic environment. The similarity of the isomer shifts in MgB2 and in cuprate superconductors is being discussed.

Original language	English
Pages (from-to)	1479-1485
Number of pages	7
Journal	Superconductor Science and Technology
Volume	15
Issue number	11
DOIs	https://doi.org/10.1088/0953-2048/15/11/301
Publication status	Published - Nov 2002

Fields of science

104005 Electrochemistry
104006 Solid state chemistry
104014 Surface chemistry
104017 Physical chemistry
105113 Crystallography
105116 Mineralogy
503013 Subject didactics of natural sciences
204 Chemical Process Engineering
204001 Inorganic chemical technology
205016 Materials testing
210006 Nanotechnology
211104 Metallurgy

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Cite this

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title = "Local environments of iron and cobalt in doped MgB2 superconductors",

abstract = "MgB2 has been doped with 57Fe and 57Co in order to probe the electronic structure of the superconductor by M{\"o}ssbauer spectroscopy. Simultaneous SEM-EDX studies showed that both Fe and Co were incorporated to some extent into the MgB2 host lattice. M{\"o}ssbauer spectroscopy indicated that Fe2B and FeB were also formed during the preparation. At higher Fe-contents Fe2B appeared unambiguously as a secondary phase in the X-ray diffraction. CoB was detected at substitution levels of 10 mol-\% and greater. Both Fe and Co doping decreased the Tc(0) modestly. Co and Fe were found to substitute at the Mg site in the MgB2 lattice. The M{\"o}ssbauer parameters for 57Co and 57Fe were consistent with a metallic environment. The similarity of the isomer shifts in MgB2 and in cuprate superconductors is being discussed.",

author = "Ern{\"o} Kuzmann and Z. Homonnay and Z. Klencs{\'a}r and Markus K{\"u}hberger and A. Vertes and Gerhard Gritzner",

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doi = "10.1088/0953-2048/15/11/301",

language = "English",

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TY - JOUR

T1 - Local environments of iron and cobalt in doped MgB2 superconductors

AU - Kuzmann, Ernö

AU - Homonnay, Z.

AU - Klencsár, Z.

AU - Kühberger, Markus

AU - Vertes, A.

AU - Gritzner, Gerhard

PY - 2002/11

Y1 - 2002/11

N2 - MgB2 has been doped with 57Fe and 57Co in order to probe the electronic structure of the superconductor by Mössbauer spectroscopy. Simultaneous SEM-EDX studies showed that both Fe and Co were incorporated to some extent into the MgB2 host lattice. Mössbauer spectroscopy indicated that Fe2B and FeB were also formed during the preparation. At higher Fe-contents Fe2B appeared unambiguously as a secondary phase in the X-ray diffraction. CoB was detected at substitution levels of 10 mol-% and greater. Both Fe and Co doping decreased the Tc(0) modestly. Co and Fe were found to substitute at the Mg site in the MgB2 lattice. The Mössbauer parameters for 57Co and 57Fe were consistent with a metallic environment. The similarity of the isomer shifts in MgB2 and in cuprate superconductors is being discussed.

AB - MgB2 has been doped with 57Fe and 57Co in order to probe the electronic structure of the superconductor by Mössbauer spectroscopy. Simultaneous SEM-EDX studies showed that both Fe and Co were incorporated to some extent into the MgB2 host lattice. Mössbauer spectroscopy indicated that Fe2B and FeB were also formed during the preparation. At higher Fe-contents Fe2B appeared unambiguously as a secondary phase in the X-ray diffraction. CoB was detected at substitution levels of 10 mol-% and greater. Both Fe and Co doping decreased the Tc(0) modestly. Co and Fe were found to substitute at the Mg site in the MgB2 lattice. The Mössbauer parameters for 57Co and 57Fe were consistent with a metallic environment. The similarity of the isomer shifts in MgB2 and in cuprate superconductors is being discussed.

UR - https://www.scopus.com/pages/publications/18744374588

U2 - 10.1088/0953-2048/15/11/301

DO - 10.1088/0953-2048/15/11/301

M3 - Article

SN - 0953-2048

VL - 15

SP - 1479

EP - 1485

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 11

ER -

Local environments of iron and cobalt in doped MgB2 superconductors

Abstract

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