Inter-grain tunneling in the half-metallic double-perovskites Sr${}_2$BB'O${}_6$ (BB'-- FeMo, FeRe, CrMo, CrW, CrRe

B. Fisher, J. Genossar, K. B. Chashka +2

The zero-field conductivities ($\sigma$) of the polycrystaline title materials, are governed by inter-grain transport. In the majority of cases their $\sigma$(T) can be described by the "flu…