L. F. Rybaltchenko, E. V. Khristenko, L. A. Ishchenko, A. V. Terekhov, I. V. Zolochevskii, E. P. Khlybov, A. J. Zaleski
The Andreev reflection spectra were studied for the first time in the magnetic superconductor Dy0.6Y0.4Rh3.85Ru0.15B4. It is found that an external magnetic field (up to 0.7 Hc2) is a strong stimulator of superconductivity in contrast with traditional superconductors with a singlet pairing. The ratio 2\Delta/kBTc \approx 4.0 obtained for some contacts is higher than the value 3.52 which is typical of conventional superconductors with a weak electron-phonon interaction. It has been proposed that in Dy0.6Y0.4Rh3.85Ru0.15B4 a triplet mechanism of superconducting pairing is realized.
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http://arxiv.org/abs/1206.1632
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