- 作者：A.A. Bykova ; redi87@bk.ru" class="auth_mail" title="E-mail the corresponding author ; Yu.O. Chetverikova ; E.V. Moskvina ; b ; A.N. Pirogovc ; d ; S.V. Grigorieva ; b
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2017
- 出版时间：15 February 2017
- 年：2017
- 卷：424
- 期：Complete
- 页码：347-351
- 全文大小：832 K
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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.
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The YMn6Sn6 compound is found to be a helimagnet in the whole temperature range below TN=310 K.
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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.
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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.
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Temperature-concentration phase diagram of Y1−xTbxMn6Sn6 is built on the basis of the obtained data.