Anisotropies of the lower and upper critical fields in MgB2 single crystals

作者:Lyard L*; Szabo P; Klein T; Marcus J; Marcenat C; Kim KH; Kang BW; Lee HS; Lee SI
来源:Physical Review Letters, 2004, 92(5): 057001.
DOI:10.1103/PhysRevLett.92.057001

摘要

The temperature dependence of the upper (H-c2) and lower (H-c1) critical fields has been deduced from Hall probe magnetization measurements of high quality MgB2 single crystals along the two main crystallographic directions. We show that Gamma(Hc2)=H-c2parallel toab/H-c2parallel toc and Gamma(Hc1)=H-c1parallel toc/H-c1parallel toab differ significantly at low temperature (being similar to5 and similar to1, respectively) and have opposite temperature dependencies. We su

  • 出版日期2004-2-6
  • 单位中国地震局