Structure and Properties of MgB2 Bulks, Thin Films, and Wires

Tatiana A. Prikhna; Vitaliy V. Romaka; Andrii P. Shapovalov; Michael Eisterer; Vladimir Sokolovsky; Harald W. Weber; Gennadiy E. Grechnev; Viktor G. Boutko; Alexander A. Gusev; Artem V. Kozyrev; Wilfried Goldacker; Viktor E. Moshchil; Vladimir B. Sverdun; Tobias Habisreuther; Christa Schmidt; Valeriy V. Kovylaev; Volodymyr E. Shaternik; Myroslav V. Karpets; Anton V. Shaternik

doi:10.1109/TASC.2016.2638201

Structure and Properties of MgB₂ Bulks, Thin Films, and Wires

Tatiana A. Prikhna, Vitaliy V. Romaka, Andrii P. Shapovalov, Michael Eisterer, Vladimir Sokolovsky, Harald W. Weber, Gennadiy E. Grechnev, Viktor G. Boutko, Alexander A. Gusev, Artem V. Kozyrev, Wilfried Goldacker, Viktor E. Moshchil, Vladimir B. Sverdun, Tobias Habisreuther, Christa Schmidt, Valeriy V. Kovylaev, Volodymyr E. Shaternik, Myroslav V. Karpets, Anton V. Shaternik

Department of Physics

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

11 Scopus citations

Abstract

This paper describes the established correlations between the characteristics of MgB₂-based superconducting materials and their structural features, in particular the oxygen distribution and content. As indicated by SEM and Auger analysis, a sizeable amount of oxygen is usually present in superconducting MgB₂ -based materials (bulks, thin films, and wires). The matrix phase of bulk MgB₂ contains rather small amounts of oxygen, but contains a high amount of dispersed inclusions or areas with compositions close to MgBO. X-ray phase analysis with Rietveld refinement (using the FullProf Suite program package) of several highly dense MgB₂ -based bulk samples (with high critical current densities) showed that the superconducting phase had a composition within the range MgB_1.68O_0.26 and MgB_1.74O_0.32 instead of pure MgB₂. Besides, a small amount of a phase with MgO structure was observed in the materials by X-rays as well. The calculation of the enthalpy of formation confirms the possibility of oxygen solubility in MgB₂ and shows that the formation of MgB_1.75B_0.25 is most favorable. The results of ab initio calculations of the electronic structure and stability of the MgB₂ compounds with partial oxygen substitution for boron show that it is energetically preferable for oxygen atoms to replace boron pairwise.

Original language	English
Article number	7779089
Journal	IEEE Transactions on Applied Superconductivity
Volume	27
Issue number	4
DOIs	https://doi.org/10.1109/TASC.2016.2638201
State	Published - 1 Jun 2017

Keywords

Boron alloys
computer simulation
critical current density
microstructure
superconducting materials and thin films

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/TASC.2016.2638201

Cite this

Prikhna, T. A., Romaka, V. V., Shapovalov, A. P., Eisterer, M., Sokolovsky, V., Weber, H. W., Grechnev, G. E., Boutko, V. G., Gusev, A. A., Kozyrev, A. V., Goldacker, W., Moshchil, V. E., Sverdun, V. B., Habisreuther, T., Schmidt, C., Kovylaev, V. V., Shaternik, V. E., Karpets, M. V., & Shaternik, A. V. (2017). Structure and Properties of MgB₂ Bulks, Thin Films, and Wires. IEEE Transactions on Applied Superconductivity, 27(4), [7779089]. https://doi.org/10.1109/TASC.2016.2638201

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title = "Structure and Properties of MgB2 Bulks, Thin Films, and Wires",

abstract = "This paper describes the established correlations between the characteristics of MgB2-based superconducting materials and their structural features, in particular the oxygen distribution and content. As indicated by SEM and Auger analysis, a sizeable amount of oxygen is usually present in superconducting MgB2 -based materials (bulks, thin films, and wires). The matrix phase of bulk MgB2 contains rather small amounts of oxygen, but contains a high amount of dispersed inclusions or areas with compositions close to MgBO. X-ray phase analysis with Rietveld refinement (using the FullProf Suite program package) of several highly dense MgB2 -based bulk samples (with high critical current densities) showed that the superconducting phase had a composition within the range MgB1.68O0.26 and MgB1.74O0.32 instead of pure MgB2. Besides, a small amount of a phase with MgO structure was observed in the materials by X-rays as well. The calculation of the enthalpy of formation confirms the possibility of oxygen solubility in MgB2 and shows that the formation of MgB1.75B0.25 is most favorable. The results of ab initio calculations of the electronic structure and stability of the MgB2 compounds with partial oxygen substitution for boron show that it is energetically preferable for oxygen atoms to replace boron pairwise.",

keywords = "Boron alloys, computer simulation, critical current density, microstructure, superconducting materials and thin films",

author = "Prikhna, {Tatiana A.} and Romaka, {Vitaliy V.} and Shapovalov, {Andrii P.} and Michael Eisterer and Vladimir Sokolovsky and Weber, {Harald W.} and Grechnev, {Gennadiy E.} and Boutko, {Viktor G.} and Gusev, {Alexander A.} and Kozyrev, {Artem V.} and Wilfried Goldacker and Moshchil, {Viktor E.} and Sverdun, {Vladimir B.} and Tobias Habisreuther and Christa Schmidt and Kovylaev, {Valeriy V.} and Shaternik, {Volodymyr E.} and Karpets, {Myroslav V.} and Shaternik, {Anton V.}",

note = "Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

year = "2017",

month = jun,

day = "1",

doi = "10.1109/TASC.2016.2638201",

language = "English",

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Prikhna, TA, Romaka, VV, Shapovalov, AP, Eisterer, M, Sokolovsky, V, Weber, HW, Grechnev, GE, Boutko, VG, Gusev, AA, Kozyrev, AV, Goldacker, W, Moshchil, VE, Sverdun, VB, Habisreuther, T, Schmidt, C, Kovylaev, VV, Shaternik, VE, Karpets, MV & Shaternik, AV 2017, 'Structure and Properties of MgB₂ Bulks, Thin Films, and Wires', IEEE Transactions on Applied Superconductivity, vol. 27, no. 4, 7779089. https://doi.org/10.1109/TASC.2016.2638201

TY - JOUR

T1 - Structure and Properties of MgB2 Bulks, Thin Films, and Wires

AU - Prikhna, Tatiana A.

AU - Romaka, Vitaliy V.

AU - Shapovalov, Andrii P.

AU - Eisterer, Michael

AU - Sokolovsky, Vladimir

AU - Weber, Harald W.

AU - Grechnev, Gennadiy E.

AU - Boutko, Viktor G.

AU - Gusev, Alexander A.

AU - Kozyrev, Artem V.

AU - Goldacker, Wilfried

AU - Moshchil, Viktor E.

AU - Sverdun, Vladimir B.

AU - Habisreuther, Tobias

AU - Schmidt, Christa

AU - Kovylaev, Valeriy V.

AU - Shaternik, Volodymyr E.

AU - Karpets, Myroslav V.

AU - Shaternik, Anton V.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - This paper describes the established correlations between the characteristics of MgB2-based superconducting materials and their structural features, in particular the oxygen distribution and content. As indicated by SEM and Auger analysis, a sizeable amount of oxygen is usually present in superconducting MgB2 -based materials (bulks, thin films, and wires). The matrix phase of bulk MgB2 contains rather small amounts of oxygen, but contains a high amount of dispersed inclusions or areas with compositions close to MgBO. X-ray phase analysis with Rietveld refinement (using the FullProf Suite program package) of several highly dense MgB2 -based bulk samples (with high critical current densities) showed that the superconducting phase had a composition within the range MgB1.68O0.26 and MgB1.74O0.32 instead of pure MgB2. Besides, a small amount of a phase with MgO structure was observed in the materials by X-rays as well. The calculation of the enthalpy of formation confirms the possibility of oxygen solubility in MgB2 and shows that the formation of MgB1.75B0.25 is most favorable. The results of ab initio calculations of the electronic structure and stability of the MgB2 compounds with partial oxygen substitution for boron show that it is energetically preferable for oxygen atoms to replace boron pairwise.

AB - This paper describes the established correlations between the characteristics of MgB2-based superconducting materials and their structural features, in particular the oxygen distribution and content. As indicated by SEM and Auger analysis, a sizeable amount of oxygen is usually present in superconducting MgB2 -based materials (bulks, thin films, and wires). The matrix phase of bulk MgB2 contains rather small amounts of oxygen, but contains a high amount of dispersed inclusions or areas with compositions close to MgBO. X-ray phase analysis with Rietveld refinement (using the FullProf Suite program package) of several highly dense MgB2 -based bulk samples (with high critical current densities) showed that the superconducting phase had a composition within the range MgB1.68O0.26 and MgB1.74O0.32 instead of pure MgB2. Besides, a small amount of a phase with MgO structure was observed in the materials by X-rays as well. The calculation of the enthalpy of formation confirms the possibility of oxygen solubility in MgB2 and shows that the formation of MgB1.75B0.25 is most favorable. The results of ab initio calculations of the electronic structure and stability of the MgB2 compounds with partial oxygen substitution for boron show that it is energetically preferable for oxygen atoms to replace boron pairwise.

KW - Boron alloys

KW - computer simulation

KW - critical current density

KW - microstructure

KW - superconducting materials and thin films

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