| Abstract: | In this review-article we first present and discuss some typical physical properties of spin-glass-alloys, such as magnetic susceptibility, hysteresis, time-dependent magnetic effects, Mössbauer-spectrum, neutron magnetic scattering, specific heat and electrical conductivity. In the second part we discuss some attempts to understand the empirical properties of these systems on the background of model-calculations. Some of the existing theories explain the low-temperature-properties of spin-glasses on the basis of a magnetic phase transition (of third order), others consider the possibility of a peculiar magnetic freezing phenomenon. More exact measurements of specific heat in the critical temperature region should decide this question. |
