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Giant coupling of second-harmonic generation to a multiferroic polarization

Th. Lottermoser, D. Meier, R. V. Pisarev, and M. Fiebig
Phys. Rev. B 80, 100101(R) – Published 25 September 2009

Abstract

Spectroscopy reveals a giant coupling of optical second-harmonic generation to the spontaneous polarization in compounds with magnetically driven ferroelectricity. In TbMn2O5 the symmetry reduction by the ferroelectric order is detected with a sensitivity four orders of magnitude above the resolution limit of 10100pC/cm2. This points to an electronic rather than ionic origin of the spontaneous polarization in joint-order-parameter multiferroics. Hence, our work constitutes an inaugural experimental statement on the controversial theoretical discussion on the nature of the multiferroic polarization.

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  • Received 11 August 2009

DOI:https://doi.org/10.1103/PhysRevB.80.100101

©2009 American Physical Society

Authors & Affiliations

Th. Lottermoser1, D. Meier1, R. V. Pisarev2, and M. Fiebig1,*

  • 1HISKP, Universität Bonn, Nussallee 14-16, 53115 Bonn, Germany
  • 2Ioffe Physical Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia

  • *fiebig@hiskp.uni-bonn.de

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Issue

Vol. 80, Iss. 10 — 1 September 2009

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