Ion Track Technology

PhysicsConsult

Reimar Spohr

PostHeaderIcon Abstract

Lattice Strain in Garnet Single Crystals Caused by High Energy Heavy Ion Irradiation. B. Strocka, G. Bartels, R. Spohr. Applied Physics, vol. 21, pp. 141 - 149, (1980)

The effect of high-energy heavy ion bombardment on the lattice parameter of single crystal garnets is investigated. Lattice expansion normal to the surface corresponding to lateral compressive strain is observed via x-ray reflection topography and rocking curve analysis using a double-crystal diffractometer. Studied are (111) garnet wafers of differing composition and epitaxial ferrimagnetic iron garnet films on pure and MgZr-substituted (111) GdaGasO12 substrates. Using 132-Xe and 208-Pb ions of 1.4MeV/nucleon specific energy, the lattice expansion increases approximately linearly with dose over several orders of magnitude. The specific lattice parameter change is approximately 10^-14 per ion per cm 2 for 132Xe ions. A triple epitaxial film is used to obtain strain depth profiles.