My main goal is to magnetize and demagnetize a Mu metal shield. Till now I am using a Helmholtz coils setup and I can generate 10 mT applying 2 A DC. I am using a DRV425 fluxgate and a hall probe sensor to measure the magnetic fields.
To demostrate that my Mu metal shield is being saturated till magnetization: I am measuring the magnetic field on the sensor shielded before and after applying an external field through the Helmholtz coils.
After expose the Mu metal shield 100 seconds at 10mT of uniform field.
- Without external field applied --->Magnetic field without shield 38uT and after shielding 1,8uT aprox.
- After applied an external field of 10mT---> Magnetic field after shielding 2,5uT aprox.
I would like to know what would be the maximum magnetic field it is required to saturate the Mu metal shield till magnetization.
If somebody can suggest me a way to calculate it or some literature that touch my point. I would fully appreciate it :).