There is an assumption in the literature that the energy of the magnet is proportional to the magnetic permeability of the materials where it enters. In other words, the more permeable, the fewer electrons are magnetically attracted to it. Many researchers believe that this calculation and measurement error leads to a “correlation” (i.e. a “coupon” of low energy) and thus a very misleading statement.
How much energy are magnets able to generate?
Many studies show that magnetic attractions to a material are very large. In particular, it can take more than 1000 times the theoretical maximum magnetic permeability to generate the magnetic attraction.
There are a wide variety of explanations for this discrepancy. The main reasons:
In the early 1960s, engineers using magnets were required to calculate the total magnetization before applying it to the magnetic materials in order to avoid spurious magnetization variations in the actual materials. Since the equations used to calculate an infinite magnetization could have been totally hopelessly flawed, there was no practical use for the calculation until the early 1980’s when there were sufficient quantities of materials available (the majority of the world’s materials are made of boron nitride, a carbon-hydrogen alloy (usually carbon-based) containing nitrogen). In addition, this calculation has been made for various nonconductive materials that have a fixed magnetic permeability but no magnetic insulator in between (e.g. aluminum). At these time the calculations were done with the assumption that all the material properties were constant. This assumption was not justified since we now have more precise measurements for various materials and more sophisticated modeling (both of which allow for real values to be obtained). This discrepancy has been fully resolved for many materials.
Some theories, based on the “magnetization theory,” consider the magnetization to be the only thing that influences the magnetic field strength. By this interpretation the magnetization is the most important feature of the magnetic field that influences a magnetically polarized surface. Although this interpretation of the magnetization may seem plausible, it has two major flaws. First, the magnetization is simply not the only factor to consider in calculating the magnetic field and it has no effect on the field strength of the surface. Second, the magnetization is not a constant. It varies with temperature, pressure (i.e. the external strength of the field), and the orientation of the surface. This variation is dependent on the geometry of the surface (where the magnetization is fixed or variable).
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