Phys. Rev. Lett. 86, 1877–1880 (2001)Boron Isotope Effect in Superconducting MgB2
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) = 40.2K. 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. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.1877
DOI:
10.1103/PhysRevLett.86.1877
PACS:
74.70.Ad, 74.62.Bf
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