High damping in Fe-Ga-La alloys: Phenomenological model for magneto-mechanical hysteresis damping and experiment
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第13期
论文作者：Meng Sun Anatoly Balagurov Ivan Bobrikov Xianping Wang Wen Wen Igor S.Golovin Qianfeng Fang
摘 要：Ferromagnetic high damping（FHA） alloys with a wide temperature range from-150℃ to 300℃ have unique application value in extreme environments.In the present work,the damping behaviors of Fe-21 Ga-xLa（x=0.12 wt.%,0.24 wt.%,0.47 wt.%,1.18 wt.%,and 2.33 wt.%La） alloys have been studied in detail,and a new phenomenological model has been proposed.With the increase of La content,the Laves phase（LaGa2） in the matrix increases gradually,and the resistance opposing the domain movement increases as well.Combined with the results of synchrotron radiation X-ray diffraction,neutron diffraction,and magnetic domain observation,the resistance mainly comes from three parts:the average stress related to the lattice distortion of the matrix,the average stress related to the increasing area energy of domain walls（DWs）,and the ave rage stress related to the increasing demagnetization energy induced by the Laves phase.Different from the traditional method of reducing internal stress through annealing to improve the damping capacity,the proper internal stress barriers are necessary to Barkhausen jumps to dissipate energy.Therefore,proper doping to balance resistance and mobility of DWs is a reliable way to improve damping capacity.Meanwhile,for Fe-Al and Fe-Cr based Alloys,the new model also has a good fitting effect.This study provides a theoretical and experimental reference for improving the functional properties of ferromagnetic alloys.
Meng Sun1,2，Anatoly Balagurov3,4，Ivan Bobrikov3，Xianping Wang1，Wen Wen5，Igor S.Golovin6，Qianfeng Fang1
1. Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences2. Department of Materials Science and Engineering, University of Science and Technology of China3. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research4. Lomonosov Moscow State University5. Shanghai Advanced Research Institute, Chinese Academy of Sciences6. National University of Science and Technology “MISIS”
摘 要：Ferromagnetic high damping（FHA） alloys with a wide temperature range from-150℃ to 300℃ have unique application value in extreme environments.In the present work,the damping behaviors of Fe-21 Ga-xLa（x=0.12 wt.%,0.24 wt.%,0.47 wt.%,1.18 wt.%,and 2.33 wt.%La） alloys have been studied in detail,and a new phenomenological model has been proposed.With the increase of La content,the Laves phase（LaGa2） in the matrix increases gradually,and the resistance opposing the domain movement increases as well.Combined with the results of synchrotron radiation X-ray diffraction,neutron diffraction,and magnetic domain observation,the resistance mainly comes from three parts:the average stress related to the lattice distortion of the matrix,the average stress related to the increasing area energy of domain walls（DWs）,and the ave rage stress related to the increasing demagnetization energy induced by the Laves phase.Different from the traditional method of reducing internal stress through annealing to improve the damping capacity,the proper internal stress barriers are necessary to Barkhausen jumps to dissipate energy.Therefore,proper doping to balance resistance and mobility of DWs is a reliable way to improve damping capacity.Meanwhile,for Fe-Al and Fe-Cr based Alloys,the new model also has a good fitting effect.This study provides a theoretical and experimental reference for improving the functional properties of ferromagnetic alloys.
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