Fabrication and physical properties of [Fe/Fe4N]N multilayers with high saturation magnetization

B. Yu; L. Lin; B. Ma; Z. Z. Zhang; Q. Y. Jin; J. P. Wang

doi:10.1063/1.4943241

AIP Advances (May 2016)

Fabrication and physical properties of [Fe/Fe4N]N multilayers with high saturation magnetization

B. Yu,
L. Lin,
B. Ma,
Z. Z. Zhang,
Q. Y. Jin,
J. P. Wang

Affiliations

B. Yu: Department of Optical Science and Engineering, Fudan University, Shanghai 200433, P. R. China
L. Lin: Department of Optical Science and Engineering, Fudan University, Shanghai 200433, P. R. China
B. Ma: Department of Optical Science and Engineering, Fudan University, Shanghai 200433, P. R. China
Z. Z. Zhang: Department of Optical Science and Engineering, Fudan University, Shanghai 200433, P. R. China
Q. Y. Jin: Department of Optical Science and Engineering, Fudan University, Shanghai 200433, P. R. China
J. P. Wang: Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA

DOI: https://doi.org/10.1063/1.4943241
Journal volume & issue: Vol. 6, no. 5
pp. 056108 – 056108-6

Abstract

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[Fe/Fe4N]N multilayers with high saturation magnetization were prepared on MgO(200) substrate, by the DC reactive magnetron sputtering and then annealed at higher temperature. Their structural and magnetic properties were investigated. Epitaxial growth of α-Fe and γ’-Fe4N were demonstrated on MgO, and then excellent [Fe/Fe4N]N was obtained. Though the saturation magnetizations of the as-deposited [Fe/Fe4N]N are slightly below the average value of those of α-Fe and γ’-Fe4N, the saturation magnetization of the annealed [Fe(3.04 nm)/Fe4N(3.04 nm)]5 increases up to 1850 emu/cc, 32 % larger than that of α-Fe film. N atom diffusion from the γ’-Fe4N to the α-Fe layer at high temperature greatly improves the saturation magnetization.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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