K. P. Andryushin, A. A. Pavelko, A. V. Pavlenko, I. A. Verbenko, L. A. Shilkina, S. P. Kubrin, L. A. Reznichenko, “Relaxation dynamics, microwave absorption, and secondary periodicity in properties of rare-earth-modified bismuth ferrites”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2011, Volume 37, Issue 13,Pages <nobr>54

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Relaxation dynamics, microwave absorption, and secondary periodicity in properties of rare-earth-modified bismuth ferrites

K. P. Andryushin, A. A. Pavelko, A. V. Pavlenko, I. A. Verbenko, L. A. Shilkina, S. P. Kubrin, L. A. Reznichenko

Research Institute of Physics, Southern Federal University, Rostov-on-Don

Abstract: Based on an analysis of the structure and physical properties of bismuth ferrite (BiFeO$_3$) modified by rare-earth (RE) elements, solid solutions characterized by the presence of spontaneous magnetization, low- and high-temperature relaxation, and maximum microwave absorption have been found. It is established that these materials exhibit a secondary periodicity in their properties. The observed effects are related to the appearance of symmetry phase transitions, specific features of the crystal chemistry of RE elements, and changes in the type of solid solutions.

Received: 03.03.2011