Magnetic phase diagram of Y1−xTbxMn6Sn6 compounds

Authors:
A.A. Bykov and Yu.O. Chetverikov and E.V. Moskvin and A.N. Pirogov and S.V. Grigoriev
The year of the publication:
2017
Journal:
Journal of Magnetism and Magnetic Materials vol. 424 347–351
Keywords:
МУРН, интерметаллиды, геликомагнетик
Abstract:

Abstract The Y1−xTbxMn6Sn6 compounds (x=0, 0.175, 0.2, 0.225, 0.25) were studied by small angle neutron scattering (SANS) and paramagnetic neutron spin echo. The \{YMn6Sn6\} compound is found to be a helimagnet in the whole temperature range below TN=310 K. Close to \{TN\} an additional peak of a Lorenz shape was observed at Q=0. The peak is thought to have originated from the ferromagnetic fluctuations of the magnetic Mn moment in the ab-plane of the hexagonal crystal structure. Compounds, in which Y is replaced by Tb, change their magnetic order with the increase of temperature: from easy cone ferromagnetic phase at low T through the helicoidal phase to the ferromagnetic fluctuation close to TN. Temperature-concentration phase diagram of Y1−xTbxMn6Sn6 is built on the basis of the obtained data.

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