If chi stands for the manetic susceptibi...

If `chi` stands for the manetic susceptibility of a substance `mu` for its magnetic permeabuility and `mu_(0)` for the permeability of free space. Then

for a paramagnetic substance `: chi gt 0. mu gt 0`

for a paramagnetic substance `: chi gt 0. mu gt mu_(0)`

for a diamagnetic substance `: chi lt 0. mu gt 0`

for a ferromagnetic substance `: chi gt 1. mu gt mu_(0)`

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