Boron Isotope Effect in Superconducting MgB$_2$

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

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Boron Isotope Effect in Superconducting MgB₂

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arxiv cond-mat/0101463 v2 pith:OL5YVEDI submitted 2001-01-31 cond-mat.supr-con

Boron Isotope Effect in Superconducting MgB₂

S. L. Bud'ko , G. Lapertot , C. Petrovic , C. E. Cunningham , N. Anderson , P. C. Canfield This is my paper

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keywords boroneffectisotopetemperaturehighsuperconductingsuperconductortransition

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We report the preparation method of, and boron isotope effect for MgB$_2$, a new binary intermetallic superconductor with a remarkably high superconducting transition temperature $T_c$($^{10}$B) = 40.2 K. Measurements of both temperature dependent magnetization and specific heat reveal a 1.0 K shift in $T_c$ between Mg$^{11}$B$_2$ and Mg$^{10}$B$_2$. Whereas such a high transition temperature might imply exotic coupling mechanisms, the boron isotope effect in MgB$_2$ is consistent with the material being a phonon-mediated BCS superconductor.

Boron Isotope Effect in Superconducting MgB₂

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