Journal or Book Title
Physical Review B
We present data on temperature-dependent anisotropy of the upper critical field of MgB2 obtained from the analysis of measurements on high-purity, low-resistivity polycrystals. The anisotropy decreases in a monotonic fashion with increase of temperature.
American Physical Society
Bud'ko, Sergey L. and Canfield, Paul C., "Temperature-dependent Hc2 anisotropy in MgB2 as inferred from measurements on polycrystals" (2002). Ames Laboratory Publications. 186.