Dysprosium garnets

The spectra of dysprosium aluminium garnet (DyAlG) show similar effects to DyCrOs, with a resolved magnetic spectrum below 20 K which does not change on passing through the N6el point at 2-49 K [100]. The relaxation time decreases from 10 ns at 4-2 K to 3 ns at 20 K. 

Dysprosium gallium garnet is unique in that it shows a single line resonance even at 4-2 K because of an unusually fast spin-spin relaxation time [108]. 

Dysprosium (Dy) Owing to its important thermal neutron cross section, dysprosium is used to produce control rods in nuclear reactors and also as a neutron flux measurement. The alloy Tb Dy Fe, is used as a magnetostrictive material. The alloy Nd-Fe-B is a permanent magnet. Finally, dysprosium is also used as phosphors, catalysts, and garnet microwave devices. 

MgjR2(8104)3. This cubic garnet structure is stable only for smaller rare earths (Ho Lu, Y). The crystals prepared by Ito were too small for single crystal studies and therefore the exact structure is unknown. Andreev et al. (1975) have reported on triclinic Ca3R2SigOig (R = Er Lu) compounds but their exact structure is unknown. Ansell and Wanklyn (1975) have determined the crystal structure of monoclinic Er4PbSi40i7, which contains both Si30f,7 and 81201 groups. The erbium atoms are 6-coordinated. A similar structure has been found for dysprosium and yttrium (Wanklyn et al., 1975). 

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