有限フェリ磁性体としてのFe/Cr人工格子の磁性

概要

論文の詳細を見る
The magnetization processes of antiferromagnetically coupled Fe/Cr multilayers with two Fe layer thicknesses, such as [Fe(40Å)/Cr(10Å)/Fe(20Å)/Cr(10Å)]_N were studied. These multilayers can be considered as artificial ferrimagnets with finite numbers of layers. There are substantial differences between the magnetization processes for multilayers with even and odd numbers of Fe layers, when the magnetic field is applied along the easy axis. Because of the finite number of Fe layers, multilayers with even numbers of Fe layers show the surface spin-flop transition before the bulk spin-flop with increasing mgneitc field, since the end Fe layers are subject to half the exchange coupling of the inner Fe layers. By measurement of the magnetization curve and the field dependence of the magnetic torque, the spin-flop transition for samples was investigated, and the exchange-coupling energy in samples with 2,3, and 5 Fe layers was directly evaluated.
社団法人日本磁気学会の論文
1999-04-15