| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Influence of Film Roughness on the Soft Magnetic Properties of Fe/Ni Multilayers |
| LUO Zhi-Yuan1, TANG Jia1, MA Bin1,2**, ZHANG Zong-Zhi1, JIN Qing-Yuan1**, WANG Jian-Ping2 |
1Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), and Department of Optical Science and Engineering, Fudan University, Shanghai 200433
2The Center for Micromagnetics and Information Technologies (MINT), and Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
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| Cite this article: |
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LUO Zhi-Yuan, TANG Jia, MA Bin et al 2012 Chin. Phys. Lett. 29 127501 |
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Abstract The influence of surface/interface roughness on the magnetic properties of Fe/Ni multilayers is investigated. Two methods are employed to tune the film roughness: one varies the substrate temperature, and the other pre-deposits a Ag underlayer on the MgO substrate. For films with higher roughness, a marked rise in coercivity is observed. Three factors are discussed to be mainly responsible for the coercivity rise, involving the formation of pinholes, the reduction of exchange coupling between Fe and Ni layers, and Fe-Ni alloying at interfaces.
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Received: 21 June 2012
Published: 04 March 2013
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| PACS: |
75.70.Cn
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(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
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68.35.Ct
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(Interface structure and roughness)
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68.65.Ac
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(Multilayers)
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