Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-08-18
Physics
Condensed Matter
Strongly Correlated Electrons
Proceedings of the ACERS Annual Meeting, April 2005
Scientific paper
Multiferroic rare earth manganites attracted recent attention because of the coexistence of different types of magnetic and ferroelectric orders resulting in complex phase diagrams and a wealth of physical phenomena. The coupling and mutual interference of the different orders and the large magnetoelectric effect observed in several compounds are of fundamental interest and bear the potential for future applications in which the dielectric (magnetic) properties can be modified by the onset of a magnetic (dielectric) transition or the application of a magnetic (electric) field. The physical mechanisms of the magnetoelectric effect and the origin of ferroelectric order at magnetic transitions have yet to be explored. We discuss multiferroic phenomena in the hexagonal HoMnO3 and show that the strong magneto-dielectric coupling is intimately related to the lattice strain induced by unusually large spin-phonon correlations.
Chu Cheng-Wei
dela Cruz Clarina R.
Lorenz Beat
Sun Yadong
Wang Yong-Qiang
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