NEUTRON SCATTERING STUDY OF MAGNETIC ORDER IN A Tb0.5Dy0.5 SINGLE CRYSTAL
نویسندگان
چکیده
Neutron diffraction measurements have been made on Tbo.5Dyo.s and show initial ordering into a spiral antiferromagnetic phase (with decreasing temperature) and then into a ferromagnetic phase. The inter-layer turn angle changed from 35' to 2 3 O as the temperature moved from the NBel to the Curie temperature. In addition, a magnetostriction-related expansion of the c-axis of about 0.4 % was observed over the same temperature range. The p* riodic moment state persisted somewhat into the nominal ferromagnetic regime and was =companied by a slight increase in the turn angle (2').
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