Novel Multiferroic State of Eu 1-x YxMnO3 in High Magnetic Fields

M. Tokunaga, Y. Yamasaki, Y. Onose, Masahito Mochizuki, N. Furukawa, Y. Tokura

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Abstract

Magnetic and dielectric properties of Eu 1-x YxMnO3 (x=0 and 0.4) are studied in pulsed magnetic fields up to 55 T. For x=0, application of magnetic fields higher than 20 T along the b axis causes magnetic transitions accompanied by generation of electric polarization (P) along the a axis. Similar first-order transitions are also observed in crystals of x =0.4, in which the ground state at zero magnetic field is already a ferroelectric P □ a phase of different origin. Realistic model calculation indicates the presence of a novel multiferroic state induced by the spin exchange striction mechanism in high magnetic fields as an essential nature of the frustrated Mn spin system in this class of manganites.

Original languageEnglish
Article number187202
JournalPhysical Review Letters
Volume103
Issue number18
DOIs
Publication statusPublished - 2009 Oct 28
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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