Bibliographic Details
| 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. |
| Subjects: |
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] |
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| Database: |
Engineering Source |
