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Magnetic properties of Co/Ge(111) films: effects of growth temperatures
Author(s) -
Tsay J. S.,
Chen Y. T.,
Cheng W. C.,
Wang K. C.,
Yao Y. D.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200777388
Subject(s) - monolayer , annealing (glass) , ferromagnetism , low energy electron diffraction , materials science , condensed matter physics , diffraction , electron diffraction , anisotropy , magnetic anisotropy , crystallography , chemistry , magnetization , nanotechnology , optics , metallurgy , magnetic field , physics , quantum mechanics
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)