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Critical Behavior of Relaxational Lattice Modes in Multiferroic Cupric Oxide

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Abstract

The ultrafast lattice dynamics in a multiferroics CuO was studied by a transient birefringence measurement. The observed critical behaviors suggest different characters of ferroelectric transition, order-disorder and displacive-like types, for the two multiferroic phase transitions.

© 2016 Optical Society of America

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