Frustrated magnet at ultrahigh fields

Magnetic Phases of a Highly Frustrated Magnet, ZnCr2O4, up to an Ultrahigh Magnetic Field of 600 T.
Atsuhiko Miyata, Hiroaki Ueda, Yutaka Ueda, Hironobu Sawabe, and Shojiro Takeyama
Phys. Rev. Lett. 107, 207203 (2011)

Magnetic phase diagram . Cross symbols indicate transition points observed by the Faraday rotation method.
Broken lines show anomalies appeared in the magneto-optical absorption.