Abstract
The discovery of superconductivity in the intermetallic borocarbides systems RM2B2C (R=Y, rare earth; M=Ni, Pd, Pt) [1, 2] has given a new impulse to superconductivity research in intermetallics. These quaternary systems exhibit a variety of interesting physical properties. Non-magnetic borocarbides are either non-superconducting or are ‘good’ superconductors with transition temperatures T, of up to ca. 23 K. Even though these Tc’s are quite modest in comparison with the cuprates and fullerides, they are high for intermetallic compounds and comparable to the highest Tc-values in the A15 superconductors. Another noteworthy property of the borocarbides is the coexistence of magnetism and superconductivity whenRis a magnetic rare earth element (see for instance Müller [3]). Also a peculiar behavior of the upper critical fieldHC2is found which is explained in more datail in the contribution by Drechsler [4]
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Von Lips, H. et al. (2001). Polarization-Dependent X-Ray Absorption Spectroscopy on Single Crystal YNI2B2C Superconductors. In: Drechsler, SL., Mishonov, T. (eds) High-Tc Superconductors and Related Materials. NATO Science Series, vol 86. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0758-0_9
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