Are thicker magnets stronger?

In the previous article has introduced Are bigger magnets stronger than smaller magnets, today I'll answer the question of whether thicker magnets will be stronger.

Same magnet material size and magnetization method;

For the same material, size and type of magnetization, increasing the thickness of the magnet usually increases the magnetic strength, but there is an upper limit. As the thickness increases, the increase in magnetic strength slows down until a saturation point is reached.

The accompanying picture shows a ring-shaped neodymium magnet with a 4mm hole.

Different magnet materials, thicker magnets are not necessarily stronger

This is better understood, take the commonly used neodymium material and ceramic ferrite material, even though the neodymium magnet diameter is small and the thickness is small, but the magnetic strength may still be stronger than ferrite.

Direction of magnetization can also have an effect

As an example, 2 round neodymium magnets of 10x3mm and 10x4mm, one axially magnetized and the other radially magnetized, it is obvious that the pulling force of the 10x3mm round magnet with axial magnetization will be stronger.

Magnetic field strength is greatest at the surface of the magnet and decreases with distance. Increasing the thickness maintains a stronger magnetic field at greater distances, and when the thickness is increased to a certain point, the effect of the increase in magnetic force becomes minimal. This is because the magnet reaches magnetic saturation inside.

Note: Increasing the thickness of the magnet increases the cost and a balance needs to be found between performance and cost.

To summarize, in the case of the same magnet material, grade, magnetization direction, and dimensions except thickness, the thicker the magnet is, the stronger the magnetism will be, including the Gaussian strength, and the demagnetization resistance will be better.

Thicker Magnets Recommended: Neodymium Cylindrical Permanent Magnets

Help file;

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