. "\"Length Per Unit Magnetic Flux} is the the resistance of a material to the establishment of a magnetic field in it. It is the reciprocal of \\textit{Magnetic Permeability\", the inverse of the measure of the ability of a material to support the formation of a magnetic field within itself." . . . . . "http://en.wikipedia.org/wiki/Permeability_(electromagnetism)"^^ . "Magnetic Reluctivity"@en .