Decrease permeability of ferromagnetic materials

In summary, the conversation discussed the topic of decreasing the permeability of a ferromagnetic material without using temperature. A reference to an article on saturation in magnetic materials was provided, highlighting the variability of permeability with frequency.
  • #1
apb86
4
0
Hello.

I know very few things about solid state physics, so my question is very basic.. I'm just searching for a clue..
Have some of you ever heard about, or imagine a way, of decreasing the permeability of a ferromagnetic material? Not by raising temperature, but with electric field or electric current maybe?

Thanks
Best Regards
Alexandre
 
Physics news on Phys.org
  • #2
Check out this article for some insights:

http://en.wikipedia.org/wiki/Saturation_(magnetic )

note especially the second diagram...

and also note the PERMEABILITY "See Also' reference at the bottom of the page.

Note that permeability is in general not a fixed constant and varies with the frequency of an applied electromagnetic field.
 
Last edited by a moderator:

1. How can the permeability of ferromagnetic materials be decreased?

The permeability of ferromagnetic materials can be decreased by subjecting them to high temperatures or strong magnetic fields. This process, known as annealing, rearranges the atoms within the material and reduces its magnetic properties.

2. What causes the permeability of ferromagnetic materials to decrease?

The permeability of ferromagnetic materials decreases due to the alignment of the magnetic domains within the material. When exposed to high temperatures or strong magnetic fields, the domains become disordered, reducing the overall magnetic properties.

3. Can the permeability of ferromagnetic materials be increased again after it has been decreased?

Yes, the permeability of ferromagnetic materials can be increased again through a process called magnetic quenching. This involves rapidly cooling the material in a strong magnetic field, causing the domains to align and increase its magnetic properties.

4. What are the practical applications of decreasing the permeability of ferromagnetic materials?

Decreasing the permeability of ferromagnetic materials has several practical applications, including in the production of electromagnets, transformers, and magnetic shielding. It also helps to reduce the effects of eddy currents in electrical devices.

5. Are there any disadvantages to decreasing the permeability of ferromagnetic materials?

One potential disadvantage of decreasing the permeability of ferromagnetic materials is that it can also decrease their magnetic strength. This may make them less effective in certain applications where strong magnetic fields are required.

Similar threads

I Why are there not more ferromagnetic Materials?
    • Atomic and Condensed Matter
Replies
1
Views
2K
A Photons through transparent materials, what's going on?
    • Atomic and Condensed Matter
Replies
22
Views
5K
I Why does increasing resistance in a conductor decrease power dissipation?
    • Electromagnetism
Replies
7
Views
984
What are the properties of ferromagnetic powder?
    • Materials and Chemical Engineering
Replies
4
Views
3K
I Induced EMF in a half vs. whole ferrite toroid
    • Classical Physics
Replies
1
Views
1K
I Lab experiment: hysteresis disappears, reappears and then disappears again. How?
    • Classical Physics
Replies
1
Views
1K
I Estimation of E-field strength at a distance from dipole antenna
    • Electromagnetism
Replies
4
Views
849
High-temperature semiconductors -- mission to Venus
    • Electrical Engineering
Replies
27
Views
3K
Amorphous Ferromagnetic Metallic Alloys
    • Electrical Engineering
Replies
2
Views
2K
I How to understand experiment to measure heat capacity of solid?
    • Classical Physics
Replies
1
Views
617

Hot Threads

Recent Insights

Back
Top