摘要
Magnetic properties and microstructure of Fe/RE multilayers(thickness of Fe single layers less than or equal to 2.0 nm) both as-deposited state and after annealing( T greater than or equal to 473 K) were studied, and the reason of the change of magnetic properties was analyzed. The Fe single layers are considered to be composed of insular Fe domains in as-deposited films. Super-paramagnetic nature of the Fe domains of small size causes the films to exhibit paramagnetism. During annealing the growth of Fe domains results in the transformation of films from paramagnetic into ferromagnetic, which leads to the increase in H-c and M-s.
Magnetic properties and microstructure of Fe/RE multilayers(thickness of Fe single layers less than or equal to 2.0 nm) both as-deposited state and after annealing( T greater than or equal to 473 K) were studied, and the reason of the change of magnetic properties was analyzed. The Fe single layers are considered to be composed of insular Fe domains in as-deposited films. Super-paramagnetic nature of the Fe domains of small size causes the films to exhibit paramagnetism. During annealing the growth of Fe domains results in the transformation of films from paramagnetic into ferromagnetic, which leads to the increase in H-c and M-s.
