8 Mössbauer Spectroscopy in External Magnetic Fields
413
Fig. 8.32 Induced hyperfine
field for REFe 4 X 12 for
X = Sb (red and green) and P
(blue)
8.5.3 Spin Glasses
Spin glasses are mostly metallic alloys, showing magnetic, electronic and thermal
anomalies below a characteristic temperature. Since the discovery of spin glasses
in 1972 by Cannella and Mydosh [102] many good reviews and books have been
published [103–107]. Spin glass behaviour was first found in noble metals with small
amounts of impurities of transition metals, e.g. AuFe, CuMn, and AgMn [102], but
a lot of other materials turned out to show similar properties. Spin glasses are the
paragon of disordered systems. There exists magnetic short range order which can
413
Fig. 8.32 Induced hyperfine
field for REFe 4 X 12 for
X = Sb (red and green) and P
(blue)
8.5.3 Spin Glasses
Spin glasses are mostly metallic alloys, showing magnetic, electronic and thermal
anomalies below a characteristic temperature. Since the discovery of spin glasses
in 1972 by Cannella and Mydosh [102] many good reviews and books have been
published [103–107]. Spin glass behaviour was first found in noble metals with small
amounts of impurities of transition metals, e.g. AuFe, CuMn, and AgMn [102], but
a lot of other materials turned out to show similar properties. Spin glasses are the
paragon of disordered systems. There exists magnetic short range order which can