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Metamagnetic Domains And Dynamic Fluctuations In Febr2, O. Petracic, Christian Binek, Wolfgang Kleeman

Christian Binek Publications

The mixed phase and the regime of non-critical fluctuations of the magnetic phase diagram of FeBr₂ is investigated by SQUID susceptometry and light diffraction techniques. The experiments seem to evidence instability of the tricritical point as conjectured recently. The observation of stripe domains and light diffraction below and above T_m = 4.6 K and the virtual continuation of the phase transition line to above T_m are in agreement with the occurrence of a critical endpoint at T_m and of a bicritical endpoint at T > T_m. ©1997 American Institute of Physics.