M Sakamaki et al 2009 J. Phys.: Conf. Ser. 190 012113 doi:10.1088/1742-6596/190/1/012113
M Sakamaki1, T Konishi1, T Fujikawa1, A Persson2, C Andersson2,4, O Karis2, D Arvanitis2, H Rossner3 and E Holub-Krappe3
Show affiliationsThe spin-reorientation transition of thin Au/Co/Au films, grown in-situ on W(110), is studied in XMCD and EXAFS experiments. At 300 K, for in-situ grown Co on a Au(111) film, the dominant easy magnetization direction was found to be in the surface plane, for the uncapped Co/Au bilayers. This is a novel observation, in terms of easy magnetization direction for low thickness Co on Au. After capping with Au, a sizeable out-of-plane magnetization is observed below a thickness of four atomic Co layers. When the spin-reorientation transition occurs because of Au capping, a 5 Å thin Co layer undergoes structural changes of lattice parameters Δa/a = −1.2 % and Δc/c = +6.6 %. The observation of structural changes which accompany the spin reorientation transition, contradicts previous work on Co/Au(111), and allows to quantify the magnetoelastic energy contribution, connected with the presence of the Co/Au interface.
75.70.Ak Magnetic properties of monolayers and thin films
75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
Issue 1 (2009)
M Sakamaki et al 2009 J. Phys.: Conf. Ser. 190 012113
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Takashi Fujimori et al 2009 J. Phys.: Conf. Ser. 190 012183
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