Is the Magnetisation of Ferromagnetic Materials Thermodynamically Reversible?

In summary, the conversation discusses the reversibility of the process of magnetisation in ferromagnetic materials, with a focus on the definition of reversibility. According to the definition, a reversible process must be able to change the state of the system and environment from (a',b') to (a,b), allowing for a completely different reverse process. There is also a mention of reaching the curie temperature through heating. The speaker asks for opinions on this topic.
  • #1
paweld
255
0
I wonder if the process of magnetisation of ferromagnetic material is reversible in
a thermodynamic sense according to the following definition of reversibility?

Reversible process - let's assume that initial state of the system
was a, initial state of the environment was b and final state of the system and
environment was a' and b' appropriately. If there exists a process which
changes the state of full system (considered system + environment)
form (a',b') to (a,b) the process is said to be reversible.
(This definition allows the reverse process to completely different then the one
which change the state of the system.)

What are your opinions about it?
 
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  • #2
If you heat it up hot enough you will reach the curie temp.
 

Related to Is the Magnetisation of Ferromagnetic Materials Thermodynamically Reversible?

1. What is ferromagnetism?

Ferromagnetism is a property of certain materials, such as iron, nickel, and cobalt, where the atoms have a natural alignment of their magnetic fields, causing the material to become strongly magnetic.

2. How does magnetisation occur in ferromagnets?

Magnetisation occurs in ferromagnets when an external magnetic field is applied, causing the aligned atoms to line up in the same direction, resulting in a stronger magnetic field.

3. What factors affect the strength of magnetisation in ferromagnets?

The strength of magnetisation in ferromagnets is affected by the material's composition, temperature, and the strength of the external magnetic field applied. It is also influenced by the shape and size of the material.

4. How is the magnetisation of ferromagnets measured?

The magnetisation of ferromagnets is typically measured using a magnetometer, which measures the magnetic field strength of the material. It can also be measured indirectly by observing changes in the material's magnetic properties, such as its susceptibility or remanence.

5. Can the magnetisation of ferromagnets be reversed?

Yes, the magnetisation of ferromagnets can be reversed by applying a strong enough external magnetic field in the opposite direction. This process is known as demagnetisation and can be achieved by heating the material or applying a reverse magnetic field.

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