Abstract
The effects of magnetic impurities and the possibility of magnetic ordering in superconductors has had a rich and interesting history. In the early days, magnetic impurities substituted into a superconductor were found to quickly suppress superconductivity,[l] and this was understood in terms of the strong spin scattering of the impurity spins that disrupts the Cooper pair formation.[2] Typically ~1% substitution was enough to completely extinguish the superconducting state, and such a low concentration of magnetic moments precludes the possibility of cooperative magnetic states forming and competing with the superconducting order parameter.
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Lynn, J.W. (2001). Neutron Studies of Exchange-Coupled Superconductors. In: Müller, KH., Narozhnyi, V. (eds) Rare Earth Transition Metal Borocarbides (Nitrides): Superconducting, Magnetic and Normal State Properties. NATO Science Series, vol 14. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0763-4_13
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DOI: https://doi.org/10.1007/978-94-010-0763-4_13
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