Large magnetization-induced second harmonic generation in an enantiopure chiral magnet

Cyrille Train; Tomohiro Nuida; Ruxandra Gheorghe; Michel Gruselle; Shin-ichi Ohkoshi

doi:10.1021/ja9061568

Large magnetization-induced second harmonic generation in an enantiopure chiral magnet

J Am Chem Soc. 2009 Nov 25;131(46):16838-43. doi: 10.1021/ja9061568.

Authors

Cyrille Train¹, Tomohiro Nuida, Ruxandra Gheorghe, Michel Gruselle, Shin-ichi Ohkoshi

Affiliation

¹ Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. cyrille.train@grenoble.cnrs.fr

PMID: 19883078
DOI: 10.1021/ja9061568

Abstract

The absence of centrosymmetry in the enantiopure chiral magnet [N(CH(3))(n-C(3)H(7))(2)(C*H(CH(3))C(2)H(5))][Mn(II)Cr(III)(ox)(3)] allows the observation of bulk second harmonic generation (SHG) in this material. At low temperature, the onset of magnetization gives birth to a magnetization-induced SHG (MSHG) contribution. With an angular shift of 13.1 degrees upon magnetization reversal, the MSHG effects appear to be much larger than the corresponding linear magneto-optical effects. Thanks to the single-crystalline state of the sample, the variation of the signal with the orientation of the magnetic field and/or the angle between the polarization of the incident radiation and the outgoing SHG signal in the paramagnetic and ferromagnetic phases is reproduced and well-understood through the use of a symmetry-based analysis of the nonlinear susceptibility tensor.