The macroscopic quantity defined such that
where B is the magnetic field and H is the auxiliary magnetic field.
The so-called relative permeability is defined in terms of the magnetic permeability and magnetic susceptibility by
Electric Permittivity, H, Magnetic Field, Magnetic Susceptibility, Oersted, Permeability of Free Space, Relative Permeability
References
Bekefi, G. and Barrett, A. H. Electromagnetic Vibrations, Waves, and Radiation. Cambridge, MA: MIT Press, p. 420, 1987.
