Indirect exchange coupling between Co and Gd across nonmagnetic interlayers in Co/X/Gd/X multilayers (X=Ag, Au and W)

Masashi Ohba; Koki Takanashi; Hiroyasu Fujimori

Indirect exchange coupling between Co and Gd across nonmagnetic interlayers in Co/X/Gd/X multilayers (X=Ag, Au and W)

Masashi Ohba, Koki Takanashi, Hiroyasu Fujimori

Materials Development Division

Research output: Contribution to journal › Article

Abstract

We have investigated the indirect exchange coupling between Co and Gd across nonmagnetic interlayers in Co/X/Gd/X multilayers (X=Ag, Au and W). The strength of the coupling J_Co-Gd decreases with increasing the interlayer thickness /x for all Xs. However, the manner of the decrease depends strongly on X: J_Co-Gd decreases slowly for X=Ag and Au, and the coupling remains even for t_x≥10 Å. On the other hand, J_Co-Gd shows a drastic decrease for X=W, and the coupling disappears for t_x≥5 Å. The origin for the difference is attributable to the electronic structures of interlayers.

Original language	English
Pages (from-to)	157-160
Number of pages	4
Journal	Science Reports of the Rerearch Institutes Tohoku University Series A-Physics
Volume	42
Issue number	1
Publication status	Published - 1996 Mar 1

Keywords

Co
Gd
Indirect exchange coupling
Interlayers
Multilayers

ASJC Scopus subject areas

Condensed Matter Physics
Metals and Alloys

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Ohba, M., Takanashi, K., & Fujimori, H. (1996). Indirect exchange coupling between Co and Gd across nonmagnetic interlayers in Co/X/Gd/X multilayers (X=Ag, Au and W). Science Reports of the Rerearch Institutes Tohoku University Series A-Physics, 42(1), 157-160.

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abstract = "We have investigated the indirect exchange coupling between Co and Gd across nonmagnetic interlayers in Co/X/Gd/X multilayers (X=Ag, Au and W). The strength of the coupling JCo-Gd decreases with increasing the interlayer thickness /x for all Xs. However, the manner of the decrease depends strongly on X: JCo-Gd decreases slowly for X=Ag and Au, and the coupling remains even for tx≥10 {\AA}. On the other hand, JCo-Gd shows a drastic decrease for X=W, and the coupling disappears for tx≥5 {\AA}. The origin for the difference is attributable to the electronic structures of interlayers.",

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AU - Takanashi, Koki

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N2 - We have investigated the indirect exchange coupling between Co and Gd across nonmagnetic interlayers in Co/X/Gd/X multilayers (X=Ag, Au and W). The strength of the coupling JCo-Gd decreases with increasing the interlayer thickness /x for all Xs. However, the manner of the decrease depends strongly on X: JCo-Gd decreases slowly for X=Ag and Au, and the coupling remains even for tx≥10 Å. On the other hand, JCo-Gd shows a drastic decrease for X=W, and the coupling disappears for tx≥5 Å. The origin for the difference is attributable to the electronic structures of interlayers.

AB - We have investigated the indirect exchange coupling between Co and Gd across nonmagnetic interlayers in Co/X/Gd/X multilayers (X=Ag, Au and W). The strength of the coupling JCo-Gd decreases with increasing the interlayer thickness /x for all Xs. However, the manner of the decrease depends strongly on X: JCo-Gd decreases slowly for X=Ag and Au, and the coupling remains even for tx≥10 Å. On the other hand, JCo-Gd shows a drastic decrease for X=W, and the coupling disappears for tx≥5 Å. The origin for the difference is attributable to the electronic structures of interlayers.

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