K.Y. Ahn, T.H. Di Stefano, et al.
Journal of Applied Physics
EuO films doped with Fe and Gd+++ raise the Curie temperature to ≳200°K (from 70°K for EuO). The magnetic moment is slightly reduced to 200 emu/g (vs 232 emu/g for EuO). The characteristic optical absorption band, which is due to an electronic transition from 4f to 5d levels of Eu++ ions, remains unchanged with the peak absorption of 2.4×105/cm at 5800 Å. The longitudinal Faraday rotation at 6328 Å with an incident angle of 65°is 1.9×105 and 1.4×105 deg/cm at 7.0 and 77°K, respectively. Films deposited on several types of glasses possess square hysteresis loops with higher values of Hc (86 ∼ 100 Oe at T<10°K and less than 53 Oe at T=77°K), both of which are essential for device applications. © 1972 The American Institute of Physics.
K.Y. Ahn, T.H. Di Stefano, et al.
Journal of Applied Physics
K.Y. Ahn, S.R. Herd, et al.
JVSTA
K.Y. Ahn
Applied Physics Letters
D.S. Yee, J. Floro, et al.
JVSTA