Combination of exchange-bias and long-range interlayer couplings in Fe/fct-Mn/Co trilayers

Chih Hsiung Wang, Ya Yun Huang, Wen-Chin Lin

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9 Citations (Scopus)

Abstract

In this study, Fe/Mn/Co trilayers were grown on Cu(100) to investigate the combination of exchange-bias coupling and long-range interlayer coupling. The crystalline structures of fct-Co and fct-Mn were confirmed by low energy electron diffraction (LEED) and I/V-LEED. The magnetic hysteresis loops were measured by magneto-optical Kerr effect as a function of Fe and Mn thickness. When the fct-Mn was increased to 24 ML, the Co and Fe layers underwent incoherent two-step magnetization switching with a special feature. The interlayer coupling preferred coherent rotation of Fe and Co, but the exchange bias coupling of Mn/Co increased the coercivity of the Co layer, prohibiting rotation simultaneous with the Fe layer. As a result, during the Fe flipping, the Co layer first rotated in accordance with the Fe layer and then turned back to the initial orientation. Our simulation also demonstrated a similar phenomenon when the exchange bias coupling and interlayer coupling were of comparable magnitude.

Original languageEnglish
Article number103908
JournalJournal of Applied Physics
Volume109
Issue number10
DOIs
Publication statusPublished - 2011 May 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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