Boron Isotope Effect in Superconducting MgB2

Phys. Rev. Lett. 86, 1877 – Published 26 February 2001
S. L. Bud'ko, G. Lapertot, C. Petrovic, C. E. Cunningham, N. Anderson, and P. C. Canfield

Abstract

We report the preparation method of and boron isotope effect for MgB2, a new binary intermetallic superconductor with a remarkably high superconducting transition temperature Tc(10B)=40.2 K. Measurements of both temperature dependent magnetization and specific heat reveal a 1.0 K shift in Tc between Mg11B2 and Mg10B2. Whereas such a high transition temperature might imply exotic coupling mechanisms, the boron isotope effect in MgB2 is consistent with the material being a phonon-mediated BCS superconductor.

DOI: http://dx.doi.org/10.1103/PhysRevLett.86.1877

  • Received 30 January 2001
  • Published in the issue dated 26 February 2001

© 2001 The American Physical Society

Authors & Affiliations

S. L. Bud'ko, G. Lapertot, C. Petrovic, C. E. Cunningham, N. Anderson, and P. C. Canfield

  • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011

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