Permanent Magnetism

A ferromagnetic material that possesses permanent magnetic properties, even when it is not located within a magnetic field, is known as a permanent magnet.

a permanent magnet

It is known that one end of the magnet is called the north pole while the other is the south pole. North and south poles attract. This attraction is inversely proportional to the square of the distance between the two poles. On the contrary, like poles (i.e., north-north or south-south) repel each other.

a permanent magnet

The imaginary lines that indicate the direction of the magnetic field at a certain point are known as lines of flux. They can be seen by placing a sheet of paper on the magnet before sprinkling some iron filings on the paper. For magnets, the iron filings will cluster along the lines of flux, allowing them to become visible.

a permanent magnet

It is possible in certain circumstances for a permanent magnet can lose its magnetic properties. This can be caused by high temperature, a physical shock such as an impact or exposure to external magnetic fields.

Goudsmit magnets have alleviated this problem, and so the loss of magnetic properties can be considered negligible. This is provided that they are used within the specified operating parameters, which pertain to aspects such as temperature range and vicinity to external magnetic fields.

Most permanent magnets are made of steel. However there are now various alloys available which are better suited for this purpose.

Goudsmit supplies magnets and magnet systems based on the following four main categories of magnetic materials:

  • Aluminum-Nickel-Cobalt (AlNiCo) magnets
  • Ferrite magnets
  • Samarium-Cobalt (SmCo) magnets
  • Neodymium-Iron-Borium (NdFeB) magnets (sold under the brand name Neoflux®)

Goudsmit Magnetics Group.

This information has been sourced, reviewed and adapted from materials provided by Goudsmit Magnetics Group.

For more information on this source, please visit Goudsmit Magnetics Group.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Goudsmit Magnetics Group. (2018, July 23). Permanent Magnetism. AZoM. Retrieved on October 11, 2024 from https://www.azom.com/article.aspx?ArticleID=15319.

  • MLA

    Goudsmit Magnetics Group. "Permanent Magnetism". AZoM. 11 October 2024. <https://www.azom.com/article.aspx?ArticleID=15319>.

  • Chicago

    Goudsmit Magnetics Group. "Permanent Magnetism". AZoM. https://www.azom.com/article.aspx?ArticleID=15319. (accessed October 11, 2024).

  • Harvard

    Goudsmit Magnetics Group. 2018. Permanent Magnetism. AZoM, viewed 11 October 2024, https://www.azom.com/article.aspx?ArticleID=15319.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type
Submit

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.