Magnetic design evolution in perpendicular magnetic recording media as revealed by resonant small angle x-ray scattering

We analyze the magnetic design for different generations of perpendicular magnetic recording (PMR) media using resonant soft x-ray small angle x-ray scattering. This technique allows us to simultaneously extract in a single experiment the key structural and magnetic parameters, i.e., lateral structu...

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Veröffentlicht in:Applied physics letters 2013-09, Vol.103 (11)
Hauptverfasser: Wang, Tianhan, Mehta, Virat, Ikeda, Yoshihiro, Do, Hoa, Takano, Kentaro, Florez, Sylvia, Terris, Bruce D., Wu, Benny, Graves, Catherine, Shu, Michael, Rick, Ramon, Scherz, Andreas, Stöhr, Joachim, Hellwig, Olav
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container_issue 11
container_start_page
container_title Applied physics letters
container_volume 103
creator Wang, Tianhan
Mehta, Virat
Ikeda, Yoshihiro
Do, Hoa
Takano, Kentaro
Florez, Sylvia
Terris, Bruce D.
Wu, Benny
Graves, Catherine
Shu, Michael
Rick, Ramon
Scherz, Andreas
Stöhr, Joachim
Hellwig, Olav
description We analyze the magnetic design for different generations of perpendicular magnetic recording (PMR) media using resonant soft x-ray small angle x-ray scattering. This technique allows us to simultaneously extract in a single experiment the key structural and magnetic parameters, i.e., lateral structural grain and magnetic cluster sizes as well as their distributions. We find that earlier PMR media generations relied on an initial reduction in the magnetic cluster size down to the grain level of the high anisotropy granular base layer, while very recent media designs introduce more exchange decoupling also within the softer laterally continuous cap layer. We highlight that this recent development allows optimizing magnetic cluster size and magnetic cluster size distribution within the composite media system for maximum achievable area density, while keeping the structural grain size roughly constant.
doi_str_mv 10.1063/1.4820921
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title Magnetic design evolution in perpendicular magnetic recording media as revealed by resonant small angle x-ray scattering
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