Abstract
We discuss new types of nonlinear time-noninvariant optical susceptibilities. that arise in crystals due to magnetic ordering. We show that different contributions to the nonlinear optical susceptibilities may coexist in magnetic materials that lead to a number of unusual optical effects. Experimental data are given for magnetoelectric antiferromagnet Cr2O3, piezomagnetic α-Fe2O3 and ferroelectric antiferromagnet YMnO3. We developed a novel method to study antiferromagnetic domains by use of nonlinear spectroscopy. With use of the novel technique we confirm that in Cr2O3 in the spin-flop phase the antiferromagnetic vector is oriented along the twofold axis. In YMnO3 we observed an unusual behaviour of antiferromagnetic domains which we explain by the entropy contribution to the domain wall energy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.