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| THE CRYSTAL-STRUCTURE OF SUPERCONDUCTING LUNI2B2C AND THE RELATED PHASE LUNIBC |
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| Author(s): SIEGRIST T, ZANDBERGEN HW, CAVA RJ, KRAJEWSKI JJ, PECK WF |
| Source: NATURE Volume: 367 Issue: 6460 Pages: 254-256 Published: JAN 20 1994 |
| Times Cited: 432 References: 11 |
| Abstract: SUPERCONDUCTING intermetallic compounds with relatively high transition temperature (T(c)) have been found in the systems Ln-Tr-B-C, where Ln is a lanthanide element (Y, Ho-Lu) and Tr a transition metal (Pd or Ni)1,2. In the nickel-bearing system, the superconducting phase has the formula LnNi2B2C (ref. 2). Although many structures are known for ternary carbides and borides, only a few have been reported for quaternary borocarbides3. Here we describe two new.phases that form in the Lu-Ni-B-C system: LuNi2B2C, a superconductor with a T(c) of 16.6 K (ref. 2), and LuNiBC, a closely related non-superconducting phase. The superconductor is a variant on the layered ThCr2Si2-type structure4, with additional carbon in the Lu plane. LuNiBC is derived from LuNi2B2C by adding another layer of Lu-C, producing a NaCl-type intergrowth. A new homologous series of intermetallic phases may be derivable from the simple building principles of these two structures. |
| Document Type: Article |
| Language: English |
| Reprint Address: SIEGRIST, T (reprint author), AT&T BELL LABS, 600 MT AVE, MURRAY HILL, NJ 07974 USA |
Addresses:
1. DELFT UNIV TECHNOL, NATL CTR HIGH RESOLUT ELECTRON MICROSCOPY, 2628 AL DELFT, NETHERLANDS |
| Publisher: MACMILLAN MAGAZINES LTD, PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: MR494 |
| ISSN: 0028-0836 |
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