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Zusammenfassung:
Measurements of specific heat (C(p)), AC and DC susceptibility, and
resistivity were carried out on samples of CeCu(2)(Si(1-x)Ge(x))(2). The
system evolves continuously from the heavy fermion state at x = 0 to an
antiferromagnetically (AF) ordered state at x = 1, although the magnetic
structure undergoes significant modifications. The results strongly
suggest that the AF-ordering emerges from the A-phase of CeCu(2)Si(2).
Below the ordering temperature a systematic change in curvature in
C(p)(T) is observed for x greater than or equal to 0.6, that gets more
pronounced with decreasing x, and al x = 0.4 a sharp anomaly is observed
suggesting the existence of a critical point for 0.3 < x < 0.5. Below 1
K, a small anomaly is present al some concentrations. The results are
compared with those on the Ce(Cu(1-x)Ni(x))(2)Ge(2) system.
