Sales Toll Free No: 1-855-666-7446

Types of Magnets

Top

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet, a force that pulls on other ferromagnetic materials like iron and attracts or repels other magnets. There are different types of magnets. Some are

Let's see about them.

Permanent Magnets are of four types
  • Neodymium Iron Boron (NIB)
  • Samarium Cobalt (SmCo)
  • Alnico
  • Ceramic or Ferrite
The Neodymium Iron Boron and Samarium Cobalt magnets say no to demagnetization as it is difficult to do so. These come from rare earth or lanthanide series of elements in the periodic table. Alnico is the compound made of aluminum, nickel and cobalt. These are not so strong as NIB and SmCo and can be demagnetized easily. The magnet is least affected by temperature. Horse shoe magnets and bar magnets come under these. Ceramic or Ferrite magnets are fairly strong magnets but the magnetic strength relys on temperature.
→ Read More

Temporary Magnet

Back to Top
Temporary magnets act as a permanent magnet only there is magnetic field but this property is lost once the field disappears. Some ferromagnetic materials can be magnetized by applying magnetic field but do not resist magnetization when the field is removed hence are termed as soft.

Permanent magnets are made from magnetically hard ferromagnetic materials that stay magnetized. Iron nails if kept in magnetic field shows a good illustration.
It is a type of ferrite magnet. Magnets created by ferromagnetic substances acts as temporary magnets and has the magnetic properties for a short duration. Soft iron core gives a good illustration for it. The material which is used for core of the electromagnets having the following properties :
  1. Intensity of magnetism is high with small magnetic field
  2. Initial permeability is high
  3. Coercivity is low
  4. Retentivity is high.
→ Read More

Rare earth Magnet

Back to Top
Rare earth magnets are the rare earth elements and are generally alloys of these elements. They are brittle and are normally covered with special coating made of nickel to strengthen them. Hence these are very strong compared to other magnets and are made from Copper, nickel ferrum or ferrite.

Superconducting Magnet

Back to Top
A superconducting magnet is a electromagnet created out of the superconducting wire. To achieve so they must be cooled to cryogenic temperatures. The advantage of this is that in its superconducting state the wire can conduct much larger electric currents than any ordinary wire hence creates intense field of magnetism and can produce greater magnetic fields than all.

Advantages :
  1. In MRI machines
  2. NMR spectrometers
  3. Mass spectrometers
  4. Particle accelerators.