Superconducting properties of BeB2.75
D. P. Young, R. G. Goodrich, P. W. Adams, Julia Y. Chan, Frank R. Fronczek, F. Drymiotis, L. L. Henry
DOI 10.1103/PhysRevB.65.180518 · Physical Review B
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Abstract
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(10.8B)2.75 is superconducting below Tc=0.72 K with a critical magnetic field Hc2=0.175 T. Isotopically pure 10.0B samples have an enhanced Tc=0.79 K. Hall-effect measurements suggest that the material is intrinsically compensated.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BeB2.75 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.72 | Pressure not reported | midpoint |
| BeB2.75 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.72 | Pressure not reported | onset |
| Be(10.8B)2.75 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.72 | Pressure not reported | midpoint |
| Be(10B)2.75 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.79 | Pressure not reported | midpoint |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39 | Pressure not reported | unknown |
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