Figure 2 (IMAGE) Japan Science and Technology Agency Caption Magnetic field dependence of the Faraday rotation angle measured by the dual-comb magneto-optical effect measurement system. Magnetic hysteresis observed in (a) soft and (b) hard magnetic materials using the dual-comb system. Red and blue points are the measured data when increasing and decreasing the magnetic field, respectively. Credit ©The University of Electro-Communications, Kaoru Minoshima, and NEOARK Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.