Uncommonly High Upper Critical Field in the Superconducting KOs${}_2$O${}_6$ Pyrochlore

T. Shibauchi, L. Krusin-Elbaum, Y. Kasahara +10

The entire temperature dependence of the upper critical field $H_{c2}$ in the $\beta$-pyrochlore KOs${}_2$O${}_6$ is obtained from high-field resistivity and magnetic measurements. Bot…