They were developed in the 70s and 80s and were made from alloys of rare earth elements. They are the strongest type of permanent magnet. There are 2 types: samarium-cobalt and neodymium. They are usually plated because they are so brittle.
No, rare earth magnets do not stick to gold because gold is non-magnetic. Rare earth magnets are attracted to materials that have magnetic properties, such as iron and steel.
http://magnitrf.ru/
Rare earth magnets, such as neodymium magnets, are much stronger than traditional magnets like ferrite magnets. They are also more expensive and are made with elements from the lanthanide series of the periodic table, making them rarer and harder to produce. Rare earth magnets can retain their magnetization over a longer period of time compared to normal magnets.
Rare earth magnets were developed in 1966 by K.J. Strnat and G. Hoffer when they discovered an alloy of cobal and yttrium in a laboratory. There are several different types of rare earth metals.
A magnet ie. the the ones on your fridge are made by manufactures pushing electrical current through ferrous metals causing them to have magnetic properties. Rare earth magnets are naturally occurring elements that have magnetic properties by themselves.
Refrigerator magnets, car magnets, neodymium magnets are names of small magnets.
Rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields. You can make substitutions but you won't get the same strength of magnetism.
Rare earth magnets are very powerful magnets which have no iron. Cobalt and nickel are also magnetic.
Rare earth magnets are made from certain alloys of metals, which produce a very strong permanent magnet. These days there are quite easy to find, with sets available on amazon.com for under $10.
No, the strongest magnets are not made of steel. Instead, they are typically composed of rare-earth materials, such as neodymium or samarium-cobalt, which provide much higher magnetic strength than steel. While steel can be magnetized, its magnetic properties are generally weaker compared to those of rare-earth magnets.
Magnets themselves are not inherently bad for the environment. However, certain types of magnets, such as neodymium magnets, are made from rare earth metals that require environmentally intensive mining practices. Improper disposal of magnets can also lead to environmental contamination.
Iron, Nickel, and Cobalt. Also some of the rare earth metals, like Samarium