Journal
LOW TEMPERATURE PHYSICS
Volume 36, Issue 6, Pages 477-488Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3462535
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A brief review of research performed on ferroelectromagnetic crystals over the 50 years following the discovery of these materials by G. A. Smolenskii and his colleagues is given. During the first decades single crystals and solid solutions of ferrloelectromagnetic substances were synthesized and the first evidence of an interaction between the ferroelectric and magnetic subsystems was obtained. The first two colossal magnetoelectric (ME) effects in nickel-iodine boracite were discovered. The theory explained qualitatively the observed and predicted new ME phenomena. Subsequently, the class of ferroelectromagnets grew, and compounds in which the electric polarization was induced by a spiral magnetic structure appeared. Measuring techniques improved. The discovery at the end of the 20th century of a new optical method of second-harmonic generation set the conditions for a new renaissance in ME studies. An entire series of new colossal ME effects attesting to the realization of cross ME control of the electric (magnetic) properties of a crystal by a magnetic (electric) field has now been discovered. The ME effects of greatest significance which have been discovered in the last few years are described. It is noted that ferroelectromagnets with electric polarization of an electronic nature (compounds with mixed valence, semiconductors) are promising materials. (c) 2010 American Institute of Physics. [doi:10.1063/1.3462535]
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