Regensburg 2002 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Magnetismus
MA 10: Poster : Dünne Schichten(1-21),Spinabh.Transp.(22-39),Exch.Bias(40-51),Spindyn.(52-55),Mikromag.(56-66),Partikel(67-74),Abb.Verf.(75-77),Oberfl.+Spinelektr.+Elektr.Theo+Mikromag(75-87),PÜ+Aniso+Werkst/Leg.(88-103),Mol.Mag.+N-dim+Messm.+Postdead(104-111
MA 10.9: Poster
Dienstag, 12. März 2002, 15:00–19:00, Bereich A
The temperature-driven spin-reorientation transition in Au/Co/Au — •Katarina Removic-Langer1, Jonathan Hunter-Dunn2, Juergen Langer3, Hansjoerg Maletta1, Dimitri Arvanitis4, and Elisabeth Holub-Krappe1 — 1Hahn-Meitner-Institut Berlin — 2MAX-lab, Lund University — 3Singulus Technologies AG — 4University of Uppsala
The temperature-driven spin-reorientation transition (SRT) has been investigated in a layer of 2.1 nm Co in Au/Co/Au. The sample was epitaxially grown on a W interlayer on a single- sapphire crystal. Polarized Neutron Reflectometry (PNR) and X-ray Magnetic Circular Dichroism (XMCD) measurements were performed on the same sample. The in and out-of-plane magnetisation components were studied versus temperature between 90 to 300K. The PNR measurements indicate a continuous decrease in spin asymmetry (S) versus decreasing temperature in the remanent state. PNR provides evidence for the occurrence of a SRT in this temperature range and allows measuring the absolute value of the Co film in-plane magnetization. XMCD vector magnetometry yields both the in and out-of-plane magnetization components. Combining the PNR and XMCD results allows also obtaining separately both the orbital and the spin magnetic Co atom moments using the magneto-optic sum rules. We will discuss the temperature dependence of the orbital moment across the SRT, to our knowledge measured for the first time. Further, our measurements indicate the formation of a metastable magnetic multi-domain state below the SRT temperature.