Superconductivity in lanthanum nickel boro-nitride View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1994-11

AUTHORS

R. J. Cava, H. W. Zandbergen, B. Batlogg, H. Eisaki, H. Takagi, J. J. Krajewski, W. F. Peck, E. M. Gyorgy, S. Uchida

ABSTRACT

RESEARCH into intermetallic superconductors has recently been reinvigorated by the discovery of superconductivity at 23 K in a Y–Pd–B–C quaternary alloy1 (tying with the long-standing inter-metallic record held by Nb3 Ge (ref. 2)), and at lower temperatures in other quaternary boro-carbide alloys based on Ni, Pd and Pt3–6. The crystal structure of these new intermetallic superconductors, typified by LuNi2B2C (ref. 7), consists of one square layer of rock-salt-type LnC (where Ln stands for a rare-earth element) alternating with one layer of transition-metal boride tetrahedra. Here we report superconductivity at 12–13 K in a new quaternary intermetallic system, lanthanum nickel boro-nitride. We have determined the formula and crystal structure of superconducting La3Ni2B2N3, and also of a related non-superconducting phase LaNiBN. The crystal structure of La3Ni2B2N3 is related to that of LuM2B2C, but consists of three rock-salt-type LaN layers alter-nating with tetrahedral Ni2B2 layers, an arrangement considerably more two-dimensional than is found for the superconducting boro-carbides. These discoveries strongly suggest that a large number of unusual superconducting intermetallic phases are yet to be found, based on materials more complex than have previously been considered as candidates for superconductivity. More... »

PAGES

245-247

Journal

TITLE

Nature

ISSUE

6503

VOLUME

372

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/372245a0

DOI

http://dx.doi.org/10.1038/372245a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1010104770


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