Picture of a black hole

Strathclyde Open Access research that creates ripples...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of research papers by University of Strathclyde researchers, including by Strathclyde physicists involved in observing gravitational waves and black hole mergers as part of the Laser Interferometer Gravitational-Wave Observatory (LIGO) - but also other internationally significant research from the Department of Physics. Discover why Strathclyde's physics research is making ripples...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Finite-difference calculation of demagnetizing factors for shapes with cylindrical symmetry

Paterson, J H and Cooke, S J and Phelps, A D R (1998) Finite-difference calculation of demagnetizing factors for shapes with cylindrical symmetry. Journal of Magnetism and Magnetic Materials, 177-181. pp. 1472-1473. ISSN 0304-8853

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The effect of the demagnetizing field plays an important part in determining the response to applied magnetic fields of samples which form incomplete magnetic circuits. The demagnetizing factor N is usually calculated using a surface magnetic charge model to deduce the demagnetizing held, In this work, a finite-difference method is used to calculate the flux density for a given applied field. The effective permeability mu(rod) is then deduced. N is calculated by comparing mu(rod) with mu(r), the intrinsic permeability of the material. Calculations for cylinders and ellipsoids give very good agreement with surface charge methods. Advantages of this approach include ease of application to more complex shapes and the potential for application to non-linear materials.