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Superconductivity in Transition Metal Doped MoB4.

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Title: Superconductivity in Transition Metal Doped MoB4.
Authors: Simonson, J. W.1 jws9n@virginia.edu, Wu, D.1, Poon, S. J.1, Wolf, S. A.1,2
Source: Journal of Superconductivity & Novel Magnetism. Apr2010, Vol. 23 Issue 3, p417-422. 6p. 1 Diagram, 1 Chart, 4 Graphs.
Subject Terms: *Electric conductivity, *Transition metals, *Metallic composites, *Magnetic susceptibility, *Temperature
Abstract: Polycrystalline ingots of MoB4 have been found to be superconducting near 6 to 8 K when doped with Ti or Nb. Magnetic susceptibility measurements performed on these alloys indicate that a substantial fraction of the sample volume is superconducting below the transition temperature, while X-ray diffraction scans provide insight into the crystallographic effects of the dopants on the layered MoB4 structure, revealing both a systematic increase of the lattice constant in the direction of the boron planes and a systematic decrease in the inter-plane spacing as the dopant amount is increased. This structural expansion and contraction corresponds to an increase in T c until the dopant solubility limit is reached. These findings present a stark contrast to the effects of lattice parameter modification on superconductivity in the structurally related AlB2-type alloys. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 48278082
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Superconductivity in Transition Metal Doped MoB<subscript>4</subscript>.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Superconductivity+%26+Novel+Magnetism%22">Journal of Superconductivity & Novel Magnetism</searchLink>. Apr2010, Vol. 23 Issue 3, p417-422. 6p. 1 Diagram, 1 Chart, 4 Graphs.
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  Data: *<searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br />*<searchLink fieldCode="DE" term="%22Transition+metals%22">Transition metals</searchLink><br />*<searchLink fieldCode="DE" term="%22Metallic+composites%22">Metallic composites</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetic+susceptibility%22">Magnetic susceptibility</searchLink><br />*<searchLink fieldCode="DE" term="%22Temperature%22">Temperature</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Polycrystalline ingots of MoB4 have been found to be superconducting near 6 to 8 K when doped with Ti or Nb. Magnetic susceptibility measurements performed on these alloys indicate that a substantial fraction of the sample volume is superconducting below the transition temperature, while X-ray diffraction scans provide insight into the crystallographic effects of the dopants on the layered MoB4 structure, revealing both a systematic increase of the lattice constant in the direction of the boron planes and a systematic decrease in the inter-plane spacing as the dopant amount is increased. This structural expansion and contraction corresponds to an increase in T c until the dopant solubility limit is reached. These findings present a stark contrast to the effects of lattice parameter modification on superconductivity in the structurally related AlB2-type alloys. [ABSTRACT FROM AUTHOR]
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      – Type: doi
        Value: 10.1007/s10948-009-0593-3
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 417
    Subjects:
      – SubjectFull: Electric conductivity
        Type: general
      – SubjectFull: Transition metals
        Type: general
      – SubjectFull: Metallic composites
        Type: general
      – SubjectFull: Magnetic susceptibility
        Type: general
      – SubjectFull: Temperature
        Type: general
    Titles:
      – TitleFull: Superconductivity in Transition Metal Doped MoB4.
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            NameFull: Simonson, J. W.
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            NameFull: Wu, D.
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            NameFull: Poon, S. J.
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              Text: Apr2010
              Type: published
              Y: 2010
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            – TitleFull: Journal of Superconductivity & Novel Magnetism
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