TY - JOUR
T1 - Magnetic phase diagram study of ultrathin Co/Si(111) films
AU - Tsay, J. S.
AU - Yao, Y. D.
AU - Liou, Y.
N1 - Funding Information:
This work was supported by the National Science Council of ROC under Grant No. NSC 88-2112-M-001-038. One of the authors (J.S. Tsay) acknowledges support from the Alexander von Humboldt Foundation.
PY - 2000/5/20
Y1 - 2000/5/20
N2 - The magnetic properties of ultrathin Co/Si(111) films were studied by the surface magneto-optic Kerr effect technique. A magnetic phase diagram has been successfully established between 120 and 500 K. Several phases were observe, i.e. a nonferromagnetic Co-Si compound, a low Curie temperature Co film, canted out-of-plane anisotropy, and in-plane anisotropy. The nonferromagnetic Co-Si compound can be reduced by decreasing the substrate temperature. With an Ag buffer layer, the thermal stability of the magnetization for a Co/Si(111) film is lowered. From Auger electron spectroscopy measurement, Ag atoms in the Co/Ag/Si(111) film segregate to top layers even below 350 K. The segregation of Ag atoms to the top layer may damage the magnetic domains in the Co layer and causes the lower thermal stability of the magnetization in the Co/Ag/Si(111) film.
AB - The magnetic properties of ultrathin Co/Si(111) films were studied by the surface magneto-optic Kerr effect technique. A magnetic phase diagram has been successfully established between 120 and 500 K. Several phases were observe, i.e. a nonferromagnetic Co-Si compound, a low Curie temperature Co film, canted out-of-plane anisotropy, and in-plane anisotropy. The nonferromagnetic Co-Si compound can be reduced by decreasing the substrate temperature. With an Ag buffer layer, the thermal stability of the magnetization for a Co/Si(111) film is lowered. From Auger electron spectroscopy measurement, Ag atoms in the Co/Ag/Si(111) film segregate to top layers even below 350 K. The segregation of Ag atoms to the top layer may damage the magnetic domains in the Co layer and causes the lower thermal stability of the magnetization in the Co/Ag/Si(111) film.
UR - https://www.scopus.com/pages/publications/0033687885
UR - https://www.scopus.com/pages/publications/0033687885#tab=citedBy
U2 - 10.1016/S0039-6028(00)00158-8
DO - 10.1016/S0039-6028(00)00158-8
M3 - Conference article
AN - SCOPUS:0033687885
SN - 0039-6028
VL - 454
SP - 856
EP - 859
JO - Surface Science
JF - Surface Science
IS - 1
T2 - ECOSS-18: 18th European Conference on Surface Science
Y2 - 21 September 1999 through 24 September 1999
ER -