兰州大学机构库 >物理科学与技术学院
具有平面磁各向异性的稀土-3d过渡族金属间化合物颗粒、薄膜和片状磁性金属颗粒的微波磁性研究
Alternative TitleMicrowave magnetic properties of Rare earth-3d transitionmetal intermetallic compounds particles, films and flake-shaped magnetic metal particles with planar magnetic anisotropy
温福昇
Thesis Advisor李发伸
2008-05-23
Degree Grantor兰州大学
Place of Conferral兰州
Degree Name博士
Keyword复数磁导率 磁晶各向异性 磁性形状各向异性 稀土-3d过渡族金属间化合物 片状磁性金属颗粒 磁性薄膜
Abstract传统的高频磁性材料的性能遵从Snoek极限,难以满足进一步提高材料性能的需要。本论文提出的具有平面磁晶各向异性的稀土-3d过渡族金属间化合物颗粒和具有平面磁性形状各向异性的稀土-3d过渡族金属间化合物薄膜和片状磁性金属颗粒有望突破Snoek极限,可以同时大幅度提高材料的磁导率和共振频率。 根据这一原理,使用电弧熔炼或熔体快淬制备了具有平面磁晶各向异性的稀土-3d过渡族金属间化合物Nd2<下标!>Co17<下标!>、Nd2<下标!>(Fe0.5<下标!>Co0.5<下标!>)17<下标!>、Nd2<下标!>Fe17<下标!>、 Nd2<下标!>Fe17<下标!>Nx<下标!>、Sm2<下标!>Fe14<下标!>B颗粒,使用射频溅射制备具有平面磁性形状各向异性的稀土-3d过渡族金属间化合物薄膜Nd2<下标!>(Fe0.5<下标!>Co0.5<下标!>)17<下标!>和使用高能行星式球磨制备片状磁性金属颗粒羰基铁、坡莫合金Fe50<下标!>Ni50<下标!>、Fe80<下标!>Co20<下标!>。将粉末样品与环氧树脂混合制备复合材料,使用同轴线测量它们在0.1-18 GHz频段的复数磁导率。对于薄膜样品使用短路微带线方法测量他们在0.1-5 GHz频段的复数磁导率,讨论了材料的高频复数磁导率机制。
Other AbstractThe capability of traditional high frequency magnetic materials obeys the Snoek limit, thus it is difficult to improve. This study bases on principle that the rare earth-3d transitionmetal intermetallic compounds particles with planar magnetocrystalline anisotropy; the rare earth-3d transitionmetal intermetallic compounds films and flaked-shape magnetic metal particles with planar magnetic shape anisotropy can overcome the limitation of the Snoek limit, and the permeability and resonance frequency can be increased at the same time. The rare earth-3d transitionmetal intermetallic compounds particles Nd2<下标!>Co17<下标!>、Nd2<下标!>(Fe0.5<下标!>Co0.5<下标!>)17<下标!>、Nd2<下标!>Fe17<下标!>、 Nd2<下标!>Fe17<下标!>Nx<下标!>、Sm2<下标!>Fe14<下标!>B are prepared by arc melting method or melt-spin method. The rare earth-3d transitionmetal intermetallic compounds films Nd2<下标!>(Fe0.5<下标!>Co0.5<下标!>)17<下标!> are prepared by radio frequency sputtering. Flaked-shape magnetic metal particles carbonyl iron, permalloy Fe50<下标!>Ni50<下标!>、Fe80<下标!>Co20<下标!> by high-energy planetary ball milling have been prepared. The epoxy resin composites were prepared by mixing epoxy resin with magnetic particles and pressing into toroidal shape (φout<下标!>: 7.00 mm, φin<下标!>: 3.04 mm). The relative complex permeability of the composites has been measured in the range of 0.1-18 GHz. The relative complex permeability of films in the range of 0.1-5 GHz have been measured by shorted microstrip transmission-line perturbation method. The mechanism of relative complex permeability in high frequency has been discussed.
URL查看原文
Language中文
Document Type学位论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/229661
Collection物理科学与技术学院
Recommended Citation
GB/T 7714
温福昇. 具有平面磁各向异性的稀土-3d过渡族金属间化合物颗粒、薄膜和片状磁性金属颗粒的微波磁性研究[D]. 兰州. 兰州大学,2008.
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