Physics

Difference Between Permanent Magnet and Temporary Magnet

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Main Difference

The main difference between Permanent Magnet and Temporary Magnet is that the Permanent Magnet is the magnet whose magnet properties remain permanent, whereas the Temporary Magnet is the magnet whose magnetic properties remain impermanent.

Permanent Magnet vs. Temporary Magnet

A permanent magnet is the type of magnet that does not need any magnetic field externally to remain fully magnetized, whereas a temporary magnet is the type of magnet that needs an external magnetic field to remain fully magnetized. Permanent magnet properties do not change; on the other hand, a temporary magnet is a magnet whose magnetic properties are continuously changing. A permanent magnet is made of hard materials, while a temporary magnet is made of soft materials.

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Magnetic poles of the permanent magnet can never be reversed; on the flip side, magnetic properties of a temporary magnet can be reversed. The strength of a permanent magnet field never is changed, whereas the strength of a temporary magnet always changed with the conditions. The permanent magnet never requires electricity to behave like a magnet, whereas the temporary magnet always requires electricity to behave as a magnet. The permanent magnet also called a bar magnet, while a temporary magnet also called an electromagnet.

A permanent magnet has invariable magnetic strength; on the flip side, a temporary magnet has variable magnetic strength. A permanent magnet is more stable than the temporary magnet, whereas the temporary magnet is less stable than the permanent magnet. The magnetic field in a permanent magnet does not disappear on disappearing the external magnetic field, whereas the magnetic field in a temporary magnet disappears in disappearing the external magnetic field.

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The domains of permanent magnetic, once aligned, can never be easily reversed, while the domains of a temporary magnet, once aligned, can be easily reversed. A permanent magnet is the type of magnet in physics that is made of a hard type of permanent ferromagnetic materials; on the other hand, a temporary magnet is the type of magnet in the physics that is made of sot kind of ferromagnetic temporary materials.

Comparison Chart

Permanent MagnetTemporary Magnet
The permanent magnet is the magnet whose magnet properties remain permanent.The temporary magnet is the magnet whose magnetic properties remain impermanent.
Made Of
Made of hard materialsMade of soft materials
Magnetic Properties
ConstantVarying
Stability
More stableLess stable
Domains
Remain alignedDoes not remain aligned
Magnetic Field
Does not disappear in disappearing the external fieldDisappear in disappearing the external magnetic field
Magnetic Poles
Cannot reverseCan be reversed
Another Name
Bar magneticElectromagnetic
Electric Current
Not need electricityNeed electricity
External Magnetic Field
Not need an external magnetic field.Need an external magnetic field.
Example
IronSteel
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What is Permanent Magnet?

A permanent magnet is the type of magnet in physics that cannot change its magnetic properties with the change in changing external conditions. It means the magnetic properties of permanent magnet remain conserved whether the external conditions are. The permanent magnet is usually considered more stable than the other types of temporary magnets.

The domains in a permanent magnet are considered as permanently aligned and cannot easily be brought back to its dimensionless motion. The magnetic poles of the permanent magnet cannot be easily changed and cannot reverse its direction. Another name for calling the permanent magnet is called bar magnet and hard magnet. It is made of different kinds of hard materials.

The external magnetic field does not need to magnetize the hard magnet or bar magnet. The electrical energy is required to magnetize the magnetic. The magnetic field does not disappear in removing the external field. Permanent magnetics are generally made by the special mixing of hard and solid kind of materials for the proper magnetic properties such as steel, copper, aluminum, cobalt, etc.

It has an over long-ranged magnetic field for the convenience in determining different properties of the substance and gives its unique characteristics. The behavior of the magnets can be identified by using the hysteresis loop of the material. Examples of the permanent magnet are ferrites, a complete mixture of cobalt, strontium, iron oxides, and nickel, and Alnico, a mixture of iron, nickel, aluminum, and cobalt, etc.

What is a Temporary Magnet?

Temporary magnet is the type of magnet in physics that have special abilities to change its magnetic properties with the change in changing external conditions. It means the magnetic properties of the temporary magnet does not remain conserved whether the external conditions are. Temporary magnet is less stable than the other types of permanent magnet in the field of physical engineering.

The domains of a temporary magnet do not remain aligned permanently and continuously changed with the change in the external magnetic field, and they can easily come back to its original conditions. Another name for calling the temporary magnet is called soft magnet or electromagnet. The external magnetic field is fully needed to magnetize and demagnetize the magnetic materials.

It is made of different soft and malleable and ductile materials. The external magnetic field is very vital for its magnetization. The electrical energy is needed for the magnetization of domains of soft or electromagnetic. The poles of an electromagnet can be easily reversed or changed in its direction. The behavior of electromagnet magnetic behavior immediately disappears in disappearing the external magnetic field.

Soft magnet is usually made by mixing the soft and malleable materials for giving special and unique properties to the magnet, such as soft iron, etc. The temporary magnet has short-range magnetic fields. The soft iron act as a core in the transformers and use in powerful magnetic tools such as in MRI with the permanent magnets. The ability of a magnet is mainly identified by the help of the hysteresis loop.

Smaller the area of the loop, a temporary will be the magnet. The materials are having the lager hysteresis loop area, the more permanent ability of the magnet will it be. Examples of the temporary magnet are electromagnet or soft iron, etc.

Key Differences

  1. A permanent magnet does not require any magnetic field in the outer side to stay completely magnetized, whereas a temporary magnet requires an external magnetic field to stay completely magnetized.
  2. A permanent magnet has attractive properties that do not vary; on the other hand, the temporary magnet has attractive properties that are constantly fluctuating.
  3. A permanent magnet is a kind of magnet that is made of solid materials, while a temporary magnet is a magnet that is made of spongy materials.
  4. A permanent magnet has magnetic poles that can never be reversed; on the flip side, the temporary magnet has magnetic poles that can be reversed.
  5. A permanent magnet has an invariable strength, whereas the strength of a temporary magnet always altered with the circumstances.
  6. The permanent magnet does not need any electrical power to act as a magnet, whereas the temporary magnet always needs any electrical power to act as a magnet.
  7. The permanent magnet also called a bar magnet, while a temporary magnet also called an electromagnet.
  8. A permanent magnet has unvarying magnetic power; on the flip side, the temporary magnet has varying magnetic power.
  9. The stability of the permanent magnet is greater than a temporary magnet, whereas the stability of the temporary magnet is less than the permanent magnet.
  10. The magnetic field in a permanent magnet does not disappear easily on diminishing the outer magnetic field, whereas the magnetic field in a temporary magnet disappears in diminishing the outer magnetic field.
  11. The domains of permanent magnetic once arrange in order can never be changed while the domains of temporary magnet once arrange in order can be changed.
  12. Hard ferromagnetic always includes in the category of the permanent magnetic; on the other hand, soft ferromagnetic includes in the category of the temporary magnetic.

Conclusion

The above discussion concludes that both permanent magnet and temporary magnet are the types of magnets. The permanent magnetic is the magnetic whose magnetic polarity remains constant, whereas the temporary magnet is the magnet whose magnetic polarity is continuously varying.

Harlon Moss

Harlon currently works as a quality moderator and content writer for Difference Wiki. He graduated from the University of California in 2010 with a degree in Computer Science. Follow him on Twitter @HarlonMoss

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