Magnetism

Resonance features of the dynamic magnetic susceptibility in hexaferrite BaFe$_{12}$O$_{19}$ upon the transition from the magnetically ordered state to the paramagnetic state

A. A. Bezlepkin, S. P. Kuntsevich

V. N. Karazin Kharkiv National University

Abstract: This paper presents the results of the experimental study on the dynamic magnetic susceptibility of barium hexaferrite crystals in the temperature range of the transition from the magnetically ordered state to the paramagnetic state. The observed features of the magnetic susceptibility have been interpreted as those characteristic of the ultralow-frequency natural ferromagnetic resonance of the spin subsystem of the Bloch domain walls. The results agree well with the concepts of features of the critical spin dynamics near the Curie temperature.

Received: 23.04.2012

 English version: Physics of the Solid State, 2012, 54:12, 2387–2390

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