Abstract
The saturation magnetization and switching characteristics of amorphous Fe 77.5Si 7.5B 15 fibres were investigated after hydrogen incorporating by the electrochemical method. The switching field ( H ∗ ) increased from its as-received value (5.57 Am −1 to 18.62 Am −1 after charging with a current density ( I ch) of 30 mA cm −2 for 2 h. The saturation magnetization ( M s) decreased with hydrogen content up to a critical concentration corresponding to I ch = 60 mA cm −2 after 2 h of charging. At this critical current density, M s decreased from 1.57 T, its as-received value, to 0.89 T. The results are explained by considering various kinds of interaction of hydrogen with metals, such as electron exchange, volume dilation, etc.
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