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Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images

Dedicated to Prof. Dr.-Ing. Heinrich Wollenberger on the occasion of his 80th birthday
  • S. J. Lister , J. Kohlbrecher , V. Venkataramana , T. Thomson , K. Takano and S. L. Lee
Published/Copyright: May 18, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 9

Abstract

Perpendicular magnetic recording media based on CoCrPt – SiOx thin-films have been studied with polarised small angle neutron scattering (SANSPOL) to probe the local (sub-10 nm) granular structure and its magnetisation distribution. SANSPOL is sensitive to the direction of the magnetisation vector in the grains over a size range of 1 – 100 nm. This allows the grain size dependent magnetic reversal process to be probed in the recording layer. SANSPOL data can be analysed both using numerical models and through comparison with the granular structure determined using transmission electron microscopy. In this paper we compare these two methods in detail and demonstrate that both approaches arrive at very similar conclusions.

Keywords: SANS; Recording media; TEM; Polarised neutrons
∗ Correspondence address, Dr. Joachim Kohlbrecher, Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland, Tel.: +41 56 310 3165, Fax: +41 56 310 2939, E-mail:

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Received: 2011-4-5
Accepted: 2011-7-11
Published Online: 2013-05-18
Published in Print: 2011-09-01

© 2011, Carl Hanser Verlag, München

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  3. Editorial
  4. Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
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  13. Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
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  15. Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
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https://doi.org/10.3139/146.110562
Keywords for this article
SANS; Recording media; TEM; Polarised neutrons

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Prof. Dr.-Ing. Heinrich Wollenberger — 80 years
  5. Original Contributions
  6. Atom probe tomography: from physical metallurgy towards microelectronics
  7. Accumulation of radiation damage and disordering in MgAl2O4 under swift heavy ion irradiation
  8. TEM study of irradiation induced copper precipitation in boron alloyed EUROFER97 steel
  9. Order – disorder transformation in Ni – V alloys under electron irradiation
  10. Materials issues of the SINQ high-power spallation target
  11. The origin and development of the P{011}<111> orientation during recrystallization of particle-containing alloys
  12. Coarsening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe–Cu based steel
  13. Beyond Ni-based superalloys: Development of CoRe-based alloys for gas turbine applications at very high temperatures
  14. The effect of heat treatments on the microstructure, texture and mechanical properties of the extruded magnesium alloy ME21
  15. Analysing SANS data to determine magnetisation reversal processes in composite perpendicular magnetic recording media using TEM images
  16. Dislocationless sliding in a polycluster glass
  17. Evolution of transformation plasticity during bainitic transformation
  18. Surface tension and viscosity of NiAl catalytic precursor alloys from microgravity experiments
  19. Synthesis of carbon nanotubes by fine Ni particles in Ni3Al foam
  20. Fabrication of dielectric thin films by sputtering deposition at different pressures with (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 ceramic as target
  21. DGM News
  22. DGM News
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