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中国物理学会期刊

FeCuNbSiB单层膜和三明治膜的磁特性与巨磁阻抗效应

CSTR: 32037.14.aps.48.187

Magnetic Properties and Giant Magnetoimpednce Effects of FeCuNdSiB Single Layered and Sandwiched Films

CSTR: 32037.14.aps.48.187
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  • 用射频溅射法制备了Fe73.5Cu1Nb3Si13.5B9单层膜和 Cu或Ag作为中间层的三明治膜.溅态膜为非晶态结构.磁畴观察结果表明,单层膜在380℃退火后,呈现均匀磁化的纳米晶结构,该样品软磁特性最佳,其巨磁阻抗效应最大,在13MHz,最大磁阻抗比纵向为18%,横向为14%.溅态三明治膜具有较大的巨磁阻抗效应,在13MHz,Cu夹层三明治膜的最大磁阻抗比纵向为32%,横向为11%,Ag夹层三明治膜的最大磁阻抗比纵向为47%,横向为57%.Cu夹层三明治膜经250℃退火后,在低频下表现为巨磁电感效应,在100kHz,最大磁电感比为1733%.

     

    Magnetic properties and giant magneto-impedance (GMI) effects of Fe73.5Cu1Nb3Si13.5B9 single layered films and sandwiched fimls using Cu or Ag as the central layer prepared by radio frequency sputtering are investigated. The as-deposited single layered films are in amorphous state. The domain structures of single layered films annealed as 380℃ show that the films are in nanocrystalline state with homogeneous magnetization. The samples possess excellent soft magnetic properties and have the maxiumum values of GMI effects, the maxiumum GMI ratios are 18% and 14% in longitudinal and transverse fields, respectively, at 13MHz. Sandwiched films in the as-deposited state possess large GMI effects, the maximum GMI ratios of sandwiched films with a Cu central layer are 32% and 11% for longitudinal and transverse cases, respectively, and those of sandwiched films with a Ag central layer are 47% and 57% for longitudinal and transverse cases, respectively. Sandwiched films using Cu as the inner layer annealed at 250℃ exhibit large magneto-inductance effect at low frequencies. The maximum magneto-inductance ratio is 1733% at 100kHz.

     

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