摘要
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.
作者
骆志远
唐佳
马斌
张宗芝
金庆原
王建平
LUO Zhi-Yuan;TANG Jia;MA Bin;ZHANG Zong-Zhi;JIN Qing-Yuan;WANG Jian-Ping(Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education),and Department of Optical Science and Engineering,Fudan University,Shanghai 2004332The Center for Micromagnetics and Information Technologies(MINT),and Department of Electrical and Computer Engineering,University of Minnesota,Minneapolis,MN 55455,USA)
基金
Supported by the National Natural Science Foundation of China under Grant Nos 51071046,61078030,11074046,11174056,11274113
the National Basic Research Program of China(2009CB929201)
the Characterization Facility,University of Minnesota,a member of the NSF-funded Materials Research Facilities Network(www.mrfn.org)via the NSF MRSEC program under award number DMR-0819885.
