Interaction between exchange-bias systems in Ni 80 Fe 20 ∕ Fe 50 Mn 50 ∕ Co trilayers
Interaction between exchange-bias systems in Ni 80 Fe 20 ∕ Fe 50 Mn 50 ∕ Co trilayers
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DOI：
10.1103/physrevb.72.054429
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发表时间：
2005-08
影响因子：
3.7
通讯作者：
C. Leung;M. Blamire
中科院分区：
文献类型：
--
作者：
C. Leung;M. Blamire
The coupling effect between two adjacent exchange bias systems in a trilayer structure was studied. $\mathrm{Ni}\mathrm{Fe}∕\mathrm{Fe}\mathrm{Mn}∕\mathrm{Co}$ trilayers were prepared in a controlled field to induce conventional biasing in the bottom $\mathrm{Ni}\mathrm{Fe}∕\mathrm{Fe}\mathrm{Mn}$ system, but not in the top $\mathrm{Fe}\mathrm{Mn}∕\mathrm{Co}$ structure. By comparing the magnetic behavior of as-deposited samples with that after field cooling from high temperature, we probed the interactions between the two biased systems through a common antiferromagnetic spacer. The temperature dependences of exchange bias fields and coercivities indicated that exchange bias was not simply an effect between a ferromagnet and an antiferromagnet across the interface; the bulk of the antiferromagnet layer, together with the presence of the second biasing system, were required to account for the final behavior of the whole trilayer exchange bias structure.
