Magnetic properties of Co/Ge(111) films: effects of growth temperatures

Effects of growth temperatures to the magnetic properties of Co/Ge(111) ultrathin films have been studied. For 22 monolayers Co/Ge(111) deposited at 200 and 300 K, the difference of the temperatures where ferromagnetism disappears upon annealing treatment is about 75 K. The Co/Ge interface shows a m...

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Veröffentlicht in:	Physica Status Solidi (b) 2007-12, Vol.244 (12), p.4507-4511
Hauptverfasser:	Tsay, J. S., Chen, Y. T., Cheng, W. C., Wang, K. C., Yao, Y. D.
Format:	Artikel
Sprache:	eng
Schlagworte:	68.35.Ct 68.35.Fx 68.60.Dv 75.70.Ak Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures) Magnetic properties and materials Magnetic properties of surface, thin films and multilayers Physics
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Zusammenfassung:	Effects of growth temperatures to the magnetic properties of Co/Ge(111) ultrathin films have been studied. For 22 monolayers Co/Ge(111) deposited at 200 and 300 K, the difference of the temperatures where ferromagnetism disappears upon annealing treatment is about 75 K. The Co/Ge interface shows a more ordered structure for films deposited at 200 K as revealed by low‐energy electron diffraction measurements. The responses of magneto‐optic signals could be explained by the different morphologies at the interfaces. A Co/Ge(111) system exhibits a strong in‐plane anisotropy that is not altered by the interfacial conditions. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.200777388