Magnetic Resonance Absorption of Diphenyl-Picryl Hydrazyl at Low Magnetic Fields

Measurements of the magnetic resonance absorption line shapes and $g$ factors of diphenyl-picryl hydrazyl have been made at several frequencies below 15 Mc/sec using a linearly polarized rf field. An approximately inverse fourth power dependence of the $g$ factor with frequency was found. The frequency dependence of both the $g$ factor and line shape are found to be in agreement with a theory for the low-field case developed in a previous paper.