Abstract

Effect of substrate rotation on anisotropy and domain structure for a thin ferromagnetic film has been investigated in this work. For this purpose Co films with 10 nm thickness have been prepared by sputtering with oblique angle of incidence for various substrate rotations. This method of preparation induces a uniaxial anisotropy due to shadow deposition effect. The magnetization reversal is studied by magneto-optic Kerr effect (MOKE) based microscope in the longitudinal geometry. The Co films prepared by rotating the substrate with 10 and 20 rpm weakens the anisotropy but does not completely give isotropic films. But this leads to high dispersion in local grain anisotropy resulting in ripple and labyrinth domains. It is observed that the substrate rotation has moderate effect on uniaxial anisotropy but has significant effect on the magnetization reversal process and the domain structure.

Highlights

  • Effect of substrate rotation on anisotropy and domain structure for a thin ferromagnetic film has been investigated in this work

  • It is observed that the substrate rotation has moderate effect on uniaxial anisotropy but has significant effect on the magnetization reversal process and the domain structure

  • In this paper we report the effect of oblique deposition and rotation of substrates on anisotropy as well as on the domain structure

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Summary

Introduction

Effect of substrate rotation on anisotropy and domain structure for a thin ferromagnetic film has been investigated in this work. Controlling the anisotropy and domain structure with oblique deposition and substrate rotation Bedantaa School of Physical Sciences, National Institute of Science Education and Research (NISER), IOP Campus, Bhubaneswar-751005, India (Received 30 October 2013; accepted 28 January 2014; published online 5 February 2014)

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Conclusion

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