Influence of Interstitial Hydrogen on Temperature Dependence of Electrical Resistance of Disordered Ni-Mn Alloys
Hydrogenation of disordered Ni-Mn alloys, with manganese contents below 20at%, up to hydrogen concentrations sufficient for hydride formation completely destroys their ferromagnetism and consequently lowers the temperature coefficient of their electrical resistance. Nevertheless known anomalies in the temperature dependence of the electrical resistance near 20K and 50K which have been explained by two possible orientations of the magnetic moments of the Mn atoms are not influenced by the interstitial hydrogen. Furthermore, the addition of hydrogen with its above mentioned neutralization of the matrix ferromagnetism has no significant consequences upon the apparent spin glass character of this range of Ni-Mn alloys. The results are discussed in the context of other papers.
KeywordsTemperature Coefficient Hydrogen Concentration Manganese Content Hydride Formation Nickel Chromium
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