Discovery of Li2(Pd,Pt)3B superconductors

Abstract

Critical temperature Tc of the Li2(Pd1-xPtx)3B was reported to be 7-8K for x=0 and 2.2-2.8K for x=1. In this article we present our preliminary results on behavior of magnetization-temperature curves with starting composition of Pd-B precursor, y-Li concentration in LiyPd3B and post-annealing of the Pd-end compound. Results suggest that to maximize Tc ratio Pd:B should be close to 3:1, while y-Li has to be optimum. The lowest Tc for LiyPd3B was 4.4-4.6K, while post-annealings at 560 deg. C allowed enhancement of Tc up to 8.2-8.4K. Compositions Li2Z3B with Z=Ni, Ru, Rh, Re, Ag are not superconducting down to 1.8K. Exception is composition with Re showing superconductivity due to Re3B compound. All samples were prepared by arc melting.

arXiv comment6 pages, 5 figs. presented at M2S, 2006

References in corpus (13)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• S-wave/spin-triplet order in superconductors without inversion symmetry: Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Superconductivity in metal rich Li-Pd-B ternary Boride
• Crystal Symmetry, Electron-Phonon Coupling, and Superconducting Tendencies in Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Superconductivity of the Ternary Boride Li_2Pd_3B Probed by ^{11}B NMR
• Muon-spin-rotation measurements of the penetration depth in Li_2Pd_3B
• Magnetization measurements on Li2Pd3B superconductor
• Electronic structure of Li2Pd3B and Li2Pt3B
• Electronic structure, electron-phonon coupling and superconductivity of isotypic noncentrosymmetric crystals Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Is Li${}_2$Pd${}_3$B a self-doped hole superconductor ?
• Landau and Ott scaling for the kinetic energy density and the low $T_c$ conventional superconductors, $L{i}_{2}P{d}_{3}B$ and Nb
• Temperature dependences of the upper critical field and the Ginzburg-Landau parameter of Li2Pd3B from magnetization measurements
• A Penetration Depth Study on Li2Pd3B and Li2Pt3B

Cited by in corpus (3)

• Theory of surface spectroscopy for noncentrosymmetric superconductors
• On the superconductivity of the Li${}_x$RhB${}_y$ compositions
• Superconductivity in W3Re2C with chiral structure