I enclose some sample data of mu metal curves at lower frequency which I believe displays the drop in permeability and what you are likely to expect in the MHz range. Unfortunately there has been no research at such a high frequency by any of the material manufacturers that I am aware of, which is primarily due to the poor efficiency of this material in this range (MuMax will be in the hundreds)

Sorry I cannot be of more assistance.

Kind Regards,

I would like to know the permeability of the mu metals you carry in the MHz region. I am interested in 2 MHz and their hysteresis loss at this frequency.

Thanks

Kamal Hadidi