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Main panel: The magnetic field of the large rectangular magnet as a function of distance from its center. The red points show the experimental values and the blue points the theoretical values. Inset: The same dependence in a logarithmic plot. The theoretical values were calculated numerically by using the experimental value at d = 0.9 cm to determine the magnetization of the magnet, considered homogeneous. The validity of this approach is discussed in the text.
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