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 CuB2O4 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 Cu2+ sites, where the local inversion is slightly broken.
Original language | English |
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Article number | 013705 |
Journal | journal of the physical society of japan |
Volume | 77 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2008 Jan |
Keywords
- Canted antiferromagnet
- CuBO
- Dzyialoshinskii-Moriya interaction
- Magneto optics
- Magnetoelectric effect
- Nonreciprocal directional dichroism
- Optical magnetoelectric effect
- Spectroscopy
- Spin orbit coupling
ASJC Scopus subject areas
- Physics and Astronomy(all)