SUPERCONDUCTIVITY IN Y-NI-B BASE COMPOUNDS

被引：82

作者：

HONG, NM ^{[1
]}

MICHOR, H ^{[1
]}

VYBORNOV, M ^{[1
]}

HOLUBAR, T ^{[1
]}

HUNDEGGER, P ^{[1
]}

PERTHOLD, W ^{[1
]}

HILSCHER, G ^{[1
]}

ROGL, P ^{[1
]}

机构：

[1] UNIV VIENNA, INST PHYS CHEM, A-1090 VIENNA, AUSTRIA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1994年 / 227卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90360-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Carbon introduced in Y-Ni-B ternary alloy material was shown to stabilise a quaternary compound YNi2B2C which is also responsible for the appearance of superconductivity in Y-Ni-B alloys YNi4-xB1+x. Rietveld refinement of a nearly single-phase material of YNi2B2C confirmed isotypism with the filled ThCr2Si2-type (z(B) = 0.353(1)). Magnetic and specific heat measurements indicate type-II superconductivity in YNi2B2C with a T(c-onset) of 15.2 K and a normalised specific heat discontinuity DELTAC/gammaT(c) = 1.57. We present a first estimate of the upper critical field mu0H(c2)(0) = 3.7 T, the coherence length xi(GL) 9.4 nm and the Ginzburg-Landau parameter K = 10.5 of this new compound.

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页码：85 / 94

页数：10

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