采用熔体快淬法制备Fe81Ga19合金薄带,研究薄带试样的相结构和磁致伸缩性能.XRD和M-TG结果表明,快淬态Fe81Ga19合金基体为Fe(Ga)无序固溶体相,并有微量非对称结构的DO3相析出,且薄带厚度方向[100]择优取向.当测量磁场垂直带面时,薄带试样沿带长方向的饱和磁致伸缩达-1830×10-6.Fe81Ga19合金薄带的巨磁致伸缩与其大的形状各向异性、熔体快淬时合金内部形成的非对称结构的DO3相及薄带厚度方向[100]择优取向相关.
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