Equilibrium First-Order Melting and Second-Order Glass Transitions of the Vortex Matter in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$

H. Beidenkopf, N. Avraham, Y. Myasoedov +5

The thermodynamic $H-T$ phase diagram of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ was mapped by measuring local \emph{equilibrium} magnetization $M(H,T)$ in presence of vortex `shaking'. Two equa…