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Superconducting properties of BeB2.75 D. P. Young, R. G. Goodrich, and P. W. Adams
 

Summary: Superconducting properties of BeB2.75
D. P. Young, R. G. Goodrich, and P. W. Adams
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803
Julia Y. Chan and Frank R. Fronczek
Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803
F. Drymiotis
National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306
L. L. Henry
Department of Physics, Southern University, Baton Rouge, Louisiana 70813
Received 5 February 2002; published 9 May 2002
We present the low-temperature electronic transport properties of the intermetallic commonly known as
BeB2. In contrast to the much simpler AlB2-type structure of the 39-K superconductor MgB2 , BeB2 forms a
complex structure-type that is nearly unique in nature. The structure has 110.5 atoms per unit cell and a
stoichiometry BeB2.75 . Polycrystalline Be(10.8
B)2.75 is superconducting below Tc 0.72 K with a critical
magnetic field Hc2 0.175 T. Isotopically pure 10.0
B samples have an enhanced Tc 0.79 K. Hall-effect
measurements suggest that the material is intrinsically compensated.
DOI: 10.1103/PhysRevB.65.180518 PACS number s : 74.70.Ad, 61.66. f, 74.25.Fy, 74.62.Bf
Over the last few years there has been a renewed interest

  

Source: Adams, Philip W. - Department of Physics and Astronomy, Louisiana State University

 

Collections: Materials Science