Berlin 2008 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 28: Intermetallic Phases I

MM 28.3: Vortrag

Mittwoch, 27. Februar 2008, 18:00–18:15, H 0107

Influence of microstructure on magnetostriction properties of FePd thin films --- NOTE: This talk has been withdrawn — •Wilfried Wunderlich, Keisuke Takahashi, Daiji Kubo, Yoshihito Matsumura, and Yoshitake Nishi — Tokai University, Fac. Eng, Materials Science Dept., Hiratsuka-shi, Kanagawa, Japan

FePd-alloys as thin films are potential actuators materials due to their magnetostriction. Experiments and simulations of TEM and XRD diffraction patterns showed, that the L1_0-ordering has no influence on the lattice parameter ratio c/a=1.37. The degree of long-range order is higher for the sputtering temperature of 573K than of 423K, but the magnetostriction is higher for thin films produced at 423K. The model for explanation is contrary to the usual behavior, where ordering increases the magnetic susceptibility; for acchieving a large magnetostriction an initial degree of disorder is more favorable.