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High damping in Fe-Ga-La alloys:Phenomenological model for magneto-mechanical hysteresis damping and experiment

Journal of Materials Science & Technology 2021年第13期72卷 69-80页

作者： Meng Sun anatoly balagurov Ivan Bobrikov Xianping Wang Wen Wen Igor S.Golovin Qianfeng Fang Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Frank Laboratory of Neutron Physics Joint Institute for Nuclear ResearchDubnaRussia Lomonosov Moscow State University MoscowRussia Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China National University of Science and Technology“MISIS” MoscowRussia

Ferromagnetic high damping(FHA)alloys with a wide temperature range from-150℃to 300℃have unique application value in extreme *** 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 *** the increase of La content,the Laves phase(LaGa_(2))in the matrix increases gradually,and the resistance opposing the domain movement increases as *** 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 *** 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 ***,proper doping to balance resistance and mobility of DWs is a reliable way to improve damping ***,for Fe-Al and Fe-Cr based Alloys,the new model also has a good fitting *** study provides a theoretical and experimental reference for improving the functional properties of ferromagnetic alloys.

关键词： Magneto-mechanical hysteresis damping Laves phase(LaGa_(2)) Internal stress distribution Neutron-diffraction patterns Domain walls

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