Current-induced magnetic switching in nanopillar spin-valve systems with double free layers

Jae Chul Lee, Chun Yeol You, Sug Bong Choe, Kyung Jin Lee, Kyung Ho Shin

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1 Citation (Scopus)


Double soft ferromagnetic layers- CoFePdCoFe -were employed as a free layer of nanopillar spin valve. The system showed double jumps in electric resistance with respect to the spin current. Each jump corresponds to the switching of one of the CoFe layers in the double free layer. The absolute change in resistance of each jump is the same in the resistance versus current scans taken at different applied field values. While both jumps are present only in larger fields, only one jump is observed in low fields, which is attributed to the reversal of the inner CoFe layer. Furthermore, in the latter case an inversion of the hysteresis has been observed, which is explained by telegraph noise.

Original languageEnglish
Article number09A512
JournalJournal of Applied Physics
Issue number9
Publication statusPublished - 2007

Bibliographical note

Funding Information:
This work was supported by the TND Frontier Project funded by KISTEP, by the Korea Institute of Science and Technology Vision 21 Program, and by the Ministry of Science and Technology of Korea through the Cavendish-KAIST Cooperative Research Program. One of the authors (S.-B.C.) was supported by the Korea Science and Engineering Foundation (2005-02172). Another author (C.-Y.Y.) was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2005-070-C00053). Another author (K.J.L.) was supported by a National Research Laboratory program.

ASJC Scopus subject areas

  • General Physics and Astronomy


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