Structure, spin-stripe order, and superconductivity in La$_{1.905}$Ba$_{0.095}$CuO$_4$ with and without 1\% Zn substitution of Cu*

We have performed susceptibility, thermal transport, and neutron scattering measurements to study the effect of Zn and magnetic field on the structure, spin-stripe order and superconductivity, and the interplay between them in La$_{1.905}$Ba$_{0.095}$CuO$_4$ with and without 1\% Zn. It is shown that the bulk superconductivity is depressed by either the Zn doping or the magnetic field, spin stripe order is enhanced, and the structure is unaffected. For a range of magnetic field, the spin stripe order appears to stabilize a quasi-two-dimensional vortex glass phase.