Münster 1997 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
AM: Magnetismus
AM 1: Magnetische Schichten und Vielfachschichten I
AM 1.5: Talk
Monday, March 17, 1997, 11:00–11:15, F5
Magnetic anisotropy and exchange coupling in Fen Vm (001)
superlattices on MgO(001) — •P. Poulopoulos1, P. Isberg2, W. Platow1, W. Wisny1, M. Farle1, B. Hjörvarsson2, and K. Baberschke1 — 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin Dahlem — 2Materials Physics, Physics Department, Uppsala University, Box 530, S-75121 Uppsala, Sweden
High quality Fen Vm (001) superlattices were epitaxially grown on MgO (001) substrates in an UHV-based sputtering system. Their magnetic properties were studied by vibrating sample magnetometry, ferromagnetic resonance and magneto-optic Kerr effect experiments. By decreasing the Fe-layer thickness n (expressed in monolayers - ML), a reduction of the magnetization per Fe-volume at 10 K was observed, originating from a supression of the Fe-moment at the Fe-V interface [1]. In addition, the in-plane anisotropy, favoring the [100] crystallographic direction, decreases and the films become isotropic at a critical thickness of n=3 ML. Hysteresis loops with bilinear and biquadratic exchange coupling features [2] were recorded for a V-layer thickness of m=13 ML and were theoretically reproduced using a phenomenological model.
[1] A. Vega et al., Phys. Rev. B48, 985 (1993) and references therein
[2] M. Rührig et al., Phys. Stat. Sol. (a) 125, 635 (1991) Supported by HCM-EC, grant no. CHRX-CT94-0473 and DFG, SFB 290.