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. 2001 Feb 26;86(9):1877-80.
doi: 10.1103/PhysRevLett.86.1877.

Boron isotope effect in superconducting MgB2

S L Bud'ko  1 , G Lapertot, C Petrovic, C E Cunningham, N Anderson, P C Canfield
Affiliations

Boron isotope effect in superconducting MgB2

S L Bud'ko et al. Phys Rev Lett. .

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 T(c)(10B) = 40.2 K. Measurements of both temperature dependent magnetization and specific heat reveal a 1.0 K shift in T(c) 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.

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