The influence of applied tensile stress on power loss in Co-rich amorphous Co-Fe-Si-B ribbons with induced magnetic anisotropy

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Abstract
The influence on power loss PTof applied tensile stress & in amorphous (Co0.89Fe0.11)72Mo3Si15B10(\\lambda_{s} > 0) and Co73Mo2Si15B10(\\lambda_{s} < 0) ribbons with different induced magnetic anisotropy Kuis reported. The losses are measured under sinusoidal flux conditions atf = 50Hz,J_{\\max} = 0.57T and atf = 400Hz,J_{\\max} = 0.10T. Measurements are carried out on samples in a stress-relieved state and with magnetic anisotropies induced by stress or field annealing. Atf = 50Hz, a minimum m Ptversus & is observed. The &-value (\\sigma_{\\min}) corresponding to the minimum PTincreases with increasing |Ku|. Atf = 400Hz, a minimum in PTversus & is observed in the samples with induced magnetic anisotropy, whereas\\sigma_{\\min} = 0in the stress-relieved samiales. However, no correlation between and\\sigma_{\\min}and Kuis possible from the present data.