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Unit cell expansion in ErT2 films

Rodriguez, M.A.; Browning, J.F.; Frazer, Colleen S.; Snow, Clark S.; Tissot, Ralph G.; Boespflug, Elaine P.

XRD analysis of plasma-vapor-deposited ErT2 films during aging (T decay to He3) reveals an hkl-dependent unit-cell expansion in which (200) grains expand out-of-plane as much as 0.01 Å more than (111) out-of-plane grains. Texture analysis of an aged ErT2 film reveals a bimodal (111)/(200) out-of-plane preferred orientation. Sin2 ψ analysis reveals significant in-plane macro-strain due to He3 bubble formation/growth. The mechanistic origins regarding these observations are also discussed. © 2007 International Centre for Diffraction Data.