A short review on experimental properties of spin glasses

This review on experimental magnetic properties of spin glasses is based on static and dynamic magnetic properties derived from low field SQUID magnetometry experiments combined with properties at higher magnetic fields collected from measurements using commercial SQUID and VSM magnetometers. We describe spin glass materials and results from experimental methods designed to probe and allow analysis of their magnetic properties. Important concepts derived from these studies include the relaxation time spectrum of spin glasses, their susceptibility cusp, critical slowing down, and lack of phase transition in a magnetic field; aging, chaos-overlap and memory; the influences of spin and spatial dimensionality; magnetic hysteresis and thermo- and isothermal remanent magnetization; re-entrant spin glasses and other glassy systems such as superspin glasses.