[1] Forschungszentrum Karlsruhe,
[2] Institute for Materials Research II (IMF II),undefined
[3] Postfach 3640,undefined
[4] D-76021 Karlsruhe,undefined
[5] Germany,undefined
[6] Technische Hochschule Darmstadt,undefined
[7] Institute of Mechanics I,undefined
[8] Hochschulstrasse 1,undefined
[9] D-64289 Darmstadt,undefined
[10] Germany,undefined