First principles studies of modulated Co/Cu superlattices with strongly and weakly exchange biased Co-monolayers

Дата и время публикации : 1996-03-12T07:55:38Z

Авторы публикации и институты :
S. Krompiewski (Institute of Molecular Physics of the Polish Academy of Sciences, Poznan, Poland)
F. Süss (Institute of Physics II, University of Regensburg, Germany)
U. Krey (Institute of Physics II, University of Regensburg, Germany)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: LaTex, 9 pages, including two .eps-figures
Первичная категория: cond-mat

Все категории : cond-mat, mtrl-th

Краткий обзор статьи: First-principles calculations have been performed in order to determine effective exchange integrals between {it strongly} and {it weakly} exchange-coupled Co monolayers in certain modulated periodic $CoCu_2/CoCu_n$-type superlattices with three non-equivalent Co planes, which have not yet been studied hitherto. For $3le nle 6$ we find that the two non-equivalent exchange integrals have opposite signs, i.e.~the strong coupling is antiferromagnetic and the weak coupling ferromagnetic, and differ for $nne 4$ from each other by one order of magnitude. It is shown that the results depend on the system as a whole and could not be obtained from separate parts. Finally we suggest that ”spin valve” systems of such kind should be considered when trying to obtain good magneto-resistance together with low switching-fields.

Category: Physics