  We use Ni and Zn impurities doped into Bi2212 to test the MS (Magnetic
polaron - Spinon) model proposed earlier. We present electron-tunneling
spectroscopy of pure, Ni- and Zn-doped Bi2212 single crystals below Tc using a
break-junction technique. We show that the magnetic (Ni) and nonmagnetic (Zn)
impurities doped into CuO2 planes affect both Tc and the density of states in
Bi2212 but do it differently. In order to explain the data, we had to modify
the MS model. Thus, we present a Magnetic Coupling of Stripes (MCS) model. In
the MCS model, there is only one superconductivity - a spinon superconductivity
along charged stripes. The coherent state of the spinon superconductivity is
established by magnons which are excited by motions of charged stripes. So, in
the MCS model, the superconductivity has two mechanisms: along charged stripes
and perpendicular to stripes.
