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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Markov V. V., Edelman I. S., Seredkin V. A.
Заглавие : Mechanism of magnetic ordering in Dy1-xNix-Nibilayer films
Разночтения заглавия :авие SCOPUS: Mechanism of magnetic ordering in Dy1-x Ni x -Ni bilayer films
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 49, Is. 5. - P900-904. - ISSN 1063-7834, DOI 10.1134/S1063783407050162
Примечания : Cited References: 18. - This work was supported by the Department of Physical Sciences of the Russian Academy of Sciences (program “Spintronics”) and the Siberian Division of the Russian Academy of Sciences (complex integration project no. 3.5)
Предметные рубрики: DYSPROSIUM
MULTILAYERS
SURFACE
DY
Ключевые слова (''Своб.индексиров.''): 73--20--at--73--61--at--75--70---i
Аннотация: A mechanism for the magnetic ordering of dysprosium in Dy1-x Ni (x) -Ni bilayer films is proposed. This ordering was discovered earlier by the authors when studying magnetic circular dichroism. For x exceeding a threshold value (similar to 0.05), the contribution from the Dy1-x Ni (x) layer in a bilayer film to the magnetic circular dichroism over the temperature range 80-300 K is approximately equal in magnitude to the magnetic circular dichroism observed in a single-layer Dy film at temperatures below the ferromagnetic phase transition temperature of Dy (similar to 100 K). Since magnetic circular dichroism is an effect linear in magnetization, the observed effect is associated with magnetic ordering of the Dy1-x Ni (x) layer in bilayer films due to the simultaneous influence of two factors: the incorporation of Ni into the Dy layer and the influence of the continuous Ni sublayer. The ferromagnetic ordering of a dysprosium layer doped with nickel (under conditions of an atomic contact with a continuous nickel layer) was confirmed by the field dependences of the polar and longitudinal Kerr effects. It was shown that both layers in the bilayer structure are magnetized in the same direction and characterized by an anisotropy of the easy-plane type. The magnetic ordering is assumed to be due to the change in the density of states of the Dy1-x Ni (x) alloy caused by hybridization with the narrow peaks near the Fermi level characteristic of nickel.
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