Dysprosium magnetostriction

Silvery metal, that can be cut with a knife. Terbium alloys and additives are widely used in optoelectronics to burn CDs as well as in laser printers. The pronounced magnetostriction (Joule effect) makes "terfenol-D" (terbium-dysprosium-iron) indispensable in sonar technology. The physics of the element appears to be more interesting than its chemistry, in which it is rarely used in catalysis. 

Dysprosium 66 Dy Catalysts, electronic materials, phosphor activators, magnetic refrigeration, magnetostrictive alloys... 

Fig. 6.29. The basal plane anisotropy of dysprosium as a function of reduced magnetization. The results of Martin s, re-analysis of Rhyne s (1%5) magnetostriction measurements are shown. (Me.rhn and Rhynt, imj.

Fig. 6.31. Temperature dependence of the second and fourth order magnetostriction constants (C and A) for dysprosium, as deduced by Martin (1977) from Rhyne s (1965) strain measurements along a and b directions.

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. 

Dysprosium is a metal with bright silver luster, relatively stable in air at room temperature. The element has a very high magnetic susceptibility, which means that it is markedly paramagnetic. For dysprosium there are only few applications. One important is its use, together with terbium, in magnetostrictive materials. 

Dysprosium has not yet found many applications. One important use, however, is in magnetostrictive materials, which have been described in the terbium section above. Another is in the dysprosium oxide-nickel cermet ), which is used for cooling nuclear reactor rods. This makes use of dysprosium s ability to absorb neutrons. 

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