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\";s:11:\"\0*\0content2\";N;s:14:\"\0*\0mainContent\";N;s:13:\"\0*\0mobileDesc\";N;s:11:\"\0*\0template\";s:1:\"2\";s:6:\"\0*\0url\";N;s:11:\"\0*\0shortURL\";N;s:13:\"\0*\0showInMenu\";b:1;s:14:\"\0*\0publishDate\";s:10:\"14.10.2020\";s:16:\"\0*\0unpublishDate\";N;s:17:\"\0*\0lastChangeDate\";N;s:9:\"\0*\0author\";s:1:\"1\";s:7:\"\0*\0sort\";s:2:\"19\";s:11:\"\0*\0pictures\";N;s:14:\"\0*\0minPictures\";N;s:11:\"\0*\0keywords\";N;s:9:\"\0*\0header\";s:51:\"Double sided Whiteboard / Flip Whiteboard on wheels\";s:12:\"\0*\0menuTitle\";s:41:\"Double sided Whiteboard / Flip Whiteboard\";s:10:\"\0*\0picture\";N;s:13:\"\0*\0bigPicture\";N;s:14:\"\0*\0bigPicture2\";N;s:12:\"\0*\0menuCover\";N;}")); ?>Neodymium magnets were invented in the 1980s. They’re made up of an alloy of neodymium, iron and boron (often abbreviated to NIB).
When introduced to the market, both the raw materials and the patent licenses were very expensive. However, through the 1990s the price steadily decreased. Today, neodymium magnets are both the strongest and most affordable type of rare-earth magnet. Common applications include:
● Electric motors for cordless tools
● Hard disk drives
● Magnetic hold-downs
● Jewellery clasps
● Glass whiteboards!
While neodymium magnets are stronger and more available, we wouldn’t have them without the samarium-cobalt magnets which were invented first. Despite their head-start, these are less common than neodymium magnets due to their higher cost and lower strength. However, samarium-cobalt magnets perform much better at high temperatures, so they tend to dominate in industrial applications.
The strength of rare-earth magnets is a combination of two factors:
1. Their crystalline structures which have high magnetic anisotropy
2. Their atoms can have high magnetic moments.
Magnetic anisotropy is how directionally dependent a material’s magnetic properties are. When a material has a high magnetic anisotropy it means it magnetises along a specific axis, called the “easy axis”. It also means the material is resistant to magnetising in any other direction. It’s this resistance to changing direction that also gives rare-earth magnets very high resistance to losing their strength.
A magnetic moment is the orientation and strength of a magnetic object. The higher the magnetic moment, the stronger the magnet.
Rare-earth elements can have high magnetic moments because the orbital structure of their atoms contains numerous unpaired electrons. When electrons pair, they spin in opposite directions, canceling out their magnetic fields. Thus, the more unpaired electrons spinning in the same direction, the stronger the magnetic field produced.
Rare-earth magnets are as functional as they are fascinating. Made from special alloys, they’re a great way to transform your glass whiteboard into a multi-functional noticeboard.
Now you know everything there is to know about rare-earth magnets: what they are, how they work and how they can benefit your whiteboard use.
Looking to invest in a glass whiteboard?
Get in touch today! Great service, great prices and Australia-wide delivery to your door. Call us today on 1800 654 917 or send an email to info@justboards.com.au
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