Looking for a material with high mag. permeability, but low residual mag.

[maxuci]

Hi, I am trying to make a electromagnet to attract a ferrous material..

Currently I am using Iron and permalloy cores for my coil electromagnets, but the residual magnetism is higher than I'd like.
Is there any material with a high magnetic permeability AND low residual magnetism?

Thanks for any suggestions!

 

[0xDEADBEEF]

This might not help, but hot ferro magnets above their Curie temperature are paramagnetic. Otherwise it seems like the materials tend to pick up their own field...

 

[oswaler]

I understand your need for a material with high magnetic permeability and low residual magnetism for your electromagnet. It is important to have a strong magnetic field to attract the ferrous material, but also to minimize any leftover magnetism after the current is turned off.

One potential solution could be soft magnetic materials such as silicon steel or nickel-iron alloys. These materials have high permeability and low coercivity, meaning they are easily magnetized and demagnetized. Additionally, they have low residual magnetism, making them ideal for your application.

Another option could be using a combination of materials, such as a soft magnetic core surrounded by a high permeability shielding material. This can help reduce the residual magnetism while still providing a strong magnetic field.

I recommend conducting further research and experimentation to find the best material for your specific needs. It is also important to consider factors such as cost and availability when selecting a material. I wish you success in your project.