What is it about?
Traditional magnetic exploration often overlooks the effect of demagnetization in magnetic bodies, assuming that the magnetization of the ore body is low enough for the demagnetization effect to be negligible. However, for strongly magnetic bodies like iron ore and unexploded ordnance, this effect cannot be ignored. We propose an efficient method to calculate the magnetic field of such strong magnetic bodies, allowing for quick and accurate determination of the true magnetic field under the influence of demagnetization. Interestingly, we also discovered a mutual magnetization effect between magnetosomes, which can further alter the internal magnetization state of these bodies.
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Why is it important?
Our findings show that the self-demagnetization effect of a strong magnet significantly impacts its magnetic field. Additionally, the mutual magnetization effect further complicates the magnet’s magnetization state. This aspect is often overlooked, and our article highlights the complexity of this effect.
Perspectives
This article gives me a sense of the wonders of both the micro and macro worlds. The microcosm of self-demagnetization is mutual magnetization.
Xianzhe Yin
Aerospace Information Research Institute, Chinese Academy of Sciences
Read the Original
This page is a summary of: Efficient Magnetic Forward Modelling for Strongly Magnetized Bodies: An Iterative Integral Equation Approach, Geophysics, May 2024, Society of Exploration Geophysicists,
DOI: 10.1190/geo2023-0783.1.
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