Low Temperature Physics: 36, 477 (2010); https://doi.org/10.1063/1.3462535 (12 pages)
Fizika Nizkikh Temperatur: Volume 36, Number 6 (June 2010), p. 597-612    ( to contents , go back )

Progress in the study of ferroelectromagnets (Review Article)

I.E. Chupis

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: chupis@ilt.kharkov.ua
pos Анотація:

Received Nvember 16, 2009

Abstract

The investigations of ferroelectromagnets for the last 50 years after their discovery by G.A. Smolenskii ith collaborators are reviewed. Firstly the monocrystals and the solid solutions were synthesized and the evidence for the interaction of ferroelectric and magnetic subsystems was revealed. The first two colossal magnetoelectric (ME) effects in nickeliodine boracite were observed. The theoretic investigations explained qualitatively the observed ME effects and predicted new ones. Further the crystals with electric polarization induced by a spiral magnetic structure were discovered. The techniques of scientific measurements was improved. The discovery of a new optical method of the second harmonic generation in the end of the XX century paved the way for new renascence in ME researches. At present some new colossal ME effects were discovered which showed the reality of the mutual control of electric (magnetic) properties by magnetic (electric) field in crystal. The most significant ME effects observed in the last few years are reviewed. The ferroelectromagnets with electric polarization of an electron nature (compounds with mixed valency, semiconductors) are seemed to be most promissing for the future ME searching.

PACS: 75.80. +q Magnetomechanical effects, magnetostriction;
PACS: 78.20. Ls Magneto-optical effects.

Key words: ferroelectromagnets, magnetoelectric effects, electric polarization, magnetic moment, modulated (spiral) structures.

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