Bragg Scatter for Antiferro Order (IMAGE) Rice University Caption Researchers used the optical technique called Bragg scattering to observe the symmetry planes that are characteristic of anti-ferromagnetic order. Credit P. Duarte/Rice University Usage Restrictions Must credit: 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.