Regensburg 1998 – wissenschaftliches Programm

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AM: Magnetismus

AM 1: Oberflächenmagnetismus I

AM 1.8: Vortrag

Montag, 23. März 1998, 11:45–12:00, H10

Influence of substrate temperature on the morphology, structure and magnetism of Ni/Cu(100) ultrathin films — •M. Zheng, J. Shen, P. Ohresser, Ch. V. Mohan, M. Klaua, J. Barthel, and J. Kirschner — Max-Planck Institut f"ur Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale)

The Ni/Cu(100) system has attracted interest due to its unusual spin reorientation, i.e. from in-plane at low thickness to perpendicular at high thickness [1, 2]. In this work we study the effect of substrate temperature on the spin reorientation. For the films grown at room temperature (RT), we observed the critical thickness of spin-reorientation to be about 9.5 ML. The low-temperature (LT) grown films (  170K) display a lower critical thickness (  8 ML). Though both types of films show a similar tetragonal distortion and a chemical composition, their morphology differs dramatically: the island density of the LT films is significantly higher than that of the RT films. We use this to interpret the different magnetic behavior between the RT and LT films.

[1] B. Schulz and K.Baberschke, Phys. Rev.B 50, 13467 (1994).

[2] O. Hjortstam, K.Baberschke, J.M. Wills, B. Johansson and O.Eriksson, Phys. Rev.B 55, 15026 (1997)