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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Calculated recovery versus magnet width for a 1.5-mm-high Halbach array using different approximations, showing a similar optimal magnet width for the assumption of saturation and the arctangent function but a clearly deviating optimum when assuming a constant permeability.