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The magnetodielectric (MD) effect in two-layer composites consisting of polarized PbZr 0.53 Ti 0.47 O 3 (PZT) ceramics and Mn 0.4 Zn 0.6 Fe 2 O 4 (MZF) ferrite plates has been studied. The MD coefficient ε/ε(0) was established to depend on a thickness of the magnetostriction layer, a bias magnetic field strength, and an electric field frequency. Using thermodynamic approach an inspection of obtained results for two-layer structure has been carried out.

Using a torsion pendulum, the peculiarities of low-frequency shear elastic and anelastic properties of the improper ferroelastic crystal K2Ba(NO2)4 have been investigated for various crystallographic oriented samples at a temperature range in the vicinity of the phase transition point (TC = 420 K). The work gives insights into the nature of the internal friction and spontaneous torque arising in the samples at the Curie point.

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