Neutron diffraction and observation of superconductivity for tungsten borides, WB and W2B4

KAYHAN M., Hildebrandt E., Frotscher M., Senyshyn A., Hofmann K., Alff L., ...More

Solid State Sciences, vol.14, no.11-12, pp.1656-1659, 2012 (SCI-Expanded) identifier

  • Publication Type: Article / Abstract
  • Volume: 14 Issue: 11-12
  • Publication Date: 2012
  • Doi Number: 10.1016/j.solidstatesciences.2012.05.036
  • Journal Name: Solid State Sciences
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1656-1659
  • Keywords: Crystal structure, Neutron diffraction, Particle size, Superconductivity, Tungsten boride
  • Uşak University Affiliated: Yes

Abstract

Tungsten borides are known to be very hard and metallic materials. Tungsten monoboride, WB, becomes superconducting at Tc = 4.3 K in the tetragonal modification and Tc = 2.8 K in the orthorhombic modification. The structures of the two WB modifications were revised based on X-ray and neutron powder diffraction. W2B4, formerly known as W2B5, also shows a superconducting transition at 5.4 K, which is suppressed for small grain samples. © 2012 Elsevier Masson SAS. All rights reserved.