Large nonlinear magneto-optical effect in the centrosymmetric ferromagnetic semiconductor EuO

Masakazu Matsubara, Andreas Schmehl, Jochen Mannhart, Darrell G. Schlom, Manfred Fiebig

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Pronounced magnetic-dipole-induced second-harmonic generation (SHG) is observed in epitaxial films of the ferromagnetic semiconductor EuO. The SHG light wave emerges background-free at the Curie temperature and couples linearly to the spontaneous magnetization. The SHG spectrum is determined by spin-allowed and spin-forbidden transitions between the 4f ground state and the 5d (t2g) states of the Eu2+ ion. At the coercive field, components of the spontaneous magnetization perpendicular to the applied field are observed. Spatially resolved hysteresis measurements reveal that the ferromagnetic domains possess an average extension of <1μm although pinning effects can stabilize domains that are two orders of magnitude larger.

Original languageEnglish
Article number214447
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number21
DOIs
Publication statusPublished - 2010 Jun 30
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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