3-D write field and imaging from multilayered soft films in perpendicular recording media

Monson, J.; Coughlin, Tom

doi:10.1109/tmag.2003.816288

IEEE Trans. Magn.

2003

DOI: 10.1109/tmag.2003.816288

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3-D write field and imaging from multilayered soft films in perpendicular recording media

J. Monson

Tom Coughlin²

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Cited by 5 publications

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Sensitivity analysis of write field with respect to design parameters for perpendicular recording heads

Liu

Long

2005

Journal of Applied Physics

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In this article, an analytical solution for the write field distribution in perpendicular recording system is presented. The field distribution in soft underlayer has been taken into consideration. The computed results agree well with numerical simulations. To investigate the influence of the leading design parameters on the write field characteristics, the sensitivity analysis based on response surface methodology is carried out. Besides, the effect of the soft underlayer on the write field is also studied to provide guidelines for the perpendicular recording head design.

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Sensitivity analysis of write field with respect to design parameters for perpendicular recording heads

Liu

Long

2005

Journal of Applied Physics

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Readback Responses for Complex Recording Media Configurations

Wilton

Wood

2004

IEEE Trans. Magn.

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This paper describes a relatively simple approach to calculating the frequency response for a two-dimensional (2-D) magnetic recording system with a medium that can include an arbitrary number of layers. Each layer may have an arbitrary magnetization direction, anisotropic permeability, and exchange coupling. The approach relies on an initial transformation into the spatial frequency domain and then the use of transmission matrices to relate the fields in the different layers. The approach is general in that it provides a method for finding the field configuration for any set of 2-D magnetic sources embedded in a layered magnetic medium with a linear -relationship. Here, we focus on calculating the readback response for a variety of longitudinal and perpendicular recording configurations. Since the permeability may have any wavelength dependence, we can easily include the effect of exchange coupling in the underlayer.

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Transmission of Magnetic Fields in Three-Dimensional Multilayered Structures

Wilton

Wood

2008

IEEE Trans. Magn.

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We have extended an earlier two-dimensional (2-D) analysis to provide a relatively simple approach to calculating the transmission of magnetic fields in three-dimensional (3-D) multilayered structures. The approach accommodates complex structures composed of an arbitrary number of layers, each of which may have an arbitrary magnetization direction and anisotropic permeability. The procedure relies on an initial transformation into the 2-D spatial frequency domain and then the use of transmission matrices to relate the fields in the different layers. The approach is general in that it provides a method for finding the field configuration for any set of 3-D magnetic sources embedded in a layered magnetic structure with a linear -relationship. In this paper, we concentrate on the analytical formulation and we illustrate the method by using it to determine both the external and internal fields of some relatively simple finite 3-D geometric shapes. We also derive new 3-D expressions for the flux density at the surface of a multilayered magnetic recording medium. In a companion paper, the procedure is applied to examine readback responses for a variety of 3-D magnetic recording configurations.

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3-D write field and imaging from multilayered soft films in perpendicular recording media

Cited by 5 publications

References 6 publications

Sensitivity analysis of write field with respect to design parameters for perpendicular recording heads

Sensitivity analysis of write field with respect to design parameters for perpendicular recording heads

Readback Responses for Complex Recording Media Configurations

Transmission of Magnetic Fields in Three-Dimensional Multilayered Structures

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