Abstract
Although it has been well known that materials in which both space inversion and time reversal symmetries are broken can host optical magneto-electric effect, i.e., change in optical constants with the reversal of propagating direction of light, the largest change in absorption ever reported on this effect was 0.2%. Here we show that optical absorption in noncentrosymmetric weak ferromagnetic material CuB 2 O 4 changes by more than 100% with reversal of a low magnetic field of 300 Oe. The gigantic optical magneto-electric effect is ascribed to the canted antiferromagnetic spin ordering of square-coordinated Cu 2+ sites, where the local inversion is slightly broken.
Highlights
It has been well known that materials in which both space inversion and time reversal symmetries are broken can host optical magneto-electric effect, i.e., change in optical constants with the reversal of propagating direction of light, the largest change in absorption ever reported on this effect was 0.2%
The gigantic optical magneto-electric effect is ascribed to the canted antiferromagnetic spin ordering of squarecoordinated Cu2þ sites, where the local inversion is slightly broken
Linear magneto-electric (ME) effect — induction of magnetization by an electric field or of electric polarization by a magnetic field is anticipated in crystals which have neither space-inversion nor time-reversal symmetry.1,2) One of the intriguing effects in such ME materials is a peculiar nonreciprocal optical effect, which is a change in optical constants with the reversal of propagating direction of light.3–6) This effect can be regarded as an expansion of linear ME effects into optical frequencies
Summary
It has been well known that materials in which both space inversion and time reversal symmetries are broken can host optical magneto-electric effect, i.e., change in optical constants with the reversal of propagating direction of light, the largest change in absorption ever reported on this effect was 0.2%. Linear magneto-electric (ME) effect — induction of magnetization by an electric field or of electric polarization by a magnetic field is anticipated in crystals which have neither space-inversion nor time-reversal symmetry.1,2) One of the intriguing effects in such ME materials is a peculiar nonreciprocal optical effect, which is a change in optical constants with the reversal of propagating direction of light.3–6) This effect can be regarded as an expansion of linear ME effects into optical frequencies.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
