Magnetic Resonance in MnCO₃

Abstract

Magnetic resonance of the single crystal of MnCO₃ was investigated using microwave frequencies 9 to 36 kMc/sec. Parasaitic ferromagnetic resonance was observed at 4.2°K which can be explained by the theory of magnetic resonance developed for α-Fe₂O₃ by Motizuki and Pincus. The effective field H_DM due to the Dzyaloshinsky-Moriya interaction was obtained to be 3.7 K Oe and the other resonanue constant \sqrt2H_EH_A′ to be 1.4 K Oe, where H_E is the exchange field and H_A′ the anisotropy field in the basal plane.