Magnetic susceptibility of fe/cu multilayers : ferromagnetic, antiferromagnetic, and spin-glass phases
In this work we present low-field magnetic measurements on multilayers of Fe 1.5 nm and Cu 1.5 nm layers, repeated 10 times, grown on Si~111! and Fe 5 nm/CaF2 40 nm/Si(111), substrates. Magnetic characteristics of a spin-glass phase are exhibited by samples directly grown on Si (111), for which the...
| Authors: | , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 1998 |
| Country: | Brasil |
| Institution: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repository: | Repositório Institucional da UFRGS |
| Language: | English |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/95409 |
| Online Access: | http://hdl.handle.net/10183/95409 |
| Access Level: | Open access |
| Keyword: | Ferromagnetismo Vidros de spin Áreas clássicas de fenomenologia e suas aplicações |
| Summary: | In this work we present low-field magnetic measurements on multilayers of Fe 1.5 nm and Cu 1.5 nm layers, repeated 10 times, grown on Si~111! and Fe 5 nm/CaF2 40 nm/Si(111), substrates. Magnetic characteristics of a spin-glass phase are exhibited by samples directly grown on Si (111), for which the glass temperatures (TG) depend strongly on the magnetic field. Above TG those samples exhibit a ferromagnetic behavior. In contrast, samples grown on Fe/CaF2 buffer structure also show the spin-glass characteristics, but are antiferromagnetic above TG . This work deals with the fundamental role played by the interface between Fe and Cu for these effects, which is clearly emphasized by the experimental results. |
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