  We characterize the spontaneous magnetic field, and determine the associated
temperature Tg, in the superconducting state of
Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y) using zero and longitudinal field
MuSR measurements for various values of x and y. Our major findings are: (I) Tg
and Tc are controlled by the same energy scale, (II) the phase separation
between hole poor and hole rich regions is a microscopic one, and (III)
spontaneous magnetic fields appear gradually with no moment size evolution.
