Field-induced magnetism in the high-$T_c$ superconductor Ca${}_{2-x}$Na${}_x$CuO${}_2$Cl${}_2$ with flat CuO${}_2$ planes

K. Ohishi, I. Yamada, A. Koda +6

The internal magnetic field distribution in a mixed state of a cuprate superconductor, Ca${}_{2-x}$Na${}_x$CuO${}_2$Cl${}_2$ ($T_{\mathrm{c}}\simeq 28.5$ K, near the optimal doping), was measure…