Abstract
The appeal of magnetic superconductors is that they offer the possibility of examining how two nominally antagonistic properties (local moment magnetism and magnetic order on one hand and superconductivity on the other) interact with each other. After about half a decade of work on the heavy RNi2B2C (R1221 from now on) materials (R = Gd—Lu, Y) several clear examples of such interactions have emerged [1]. Two of the clearest experimental features are associated with (i) the near ubiquitous q ~ 0.55a* wave vector associated with magnetic ordering and phonon softening and (ii) the extreme crystalline electric field (CEF) anisotropy of the local moment sublattice. Both of these features have profound effects on the normal and superconducting properties of these materials. In addition, dramatic changes in the pinning of the flux line lattice [2,3] have recently been associated with changes in the nature of the local moment ordering. In this paper we will review the basic experimental manifestations of these features and discuss some of their implications that must still be addressed theoretically.
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Canfield, P.C., Bud’ko, S.L. (2001). Effects of Local Moment Magnetism on The Superconducting Properties of RNi2B2C Compounds. 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_3
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