SINGLE-WALL CARBON NANOTUBES ADDITION EFFECTS ON THE SUPERCONDUCTING PROPERTIES OF MgB2

被引：4

作者：

Serrano, German ^{[1
]}

Serquis, Adriana ^{[1
]}

Civale, Leonardo ^{[2
]}

Maiorov, Boris ^{[2
]}

Holesinger, Terry G. ^{[2
]}

Balakirev, Fedor ^{[3
]}

Jaime, Marcelo ^{[3
]}

机构：

[1] Consejo Nacl Invest Cient & Tecn, Ctr Atom Bariloche, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA

[3] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2009年 / 23卷 / 17期

关键词：

MgB2; swCNT; doping; critical currents; critical fields; CRITICAL-CURRENT DENSITY; DOPED MGB2; ENHANCEMENT;

D O I：

10.1142/S0217979209062803

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this work we describe the effects of adding different amount of single-wall (sw) carbon nanotubes (CNT) on the superconducting properties of MgB2. We observed that the amount of swCNT that partially dilute into the MgB2 matrix is lower than for double-wall (dw) CNT samples for the same nominal content. This C incorporation leads to an increase of the upper critical field (H-c2), with a maximum H-c2(0) extrapolated value of 33.5 T, expected for a two-gap superconductor in the dirty limit. At the same time, the fraction of swCNT that has not been incorporated into MgB2 lattice may retain their structural integrity acting as strong vortex pinning centers. In this case the optimum nominal swCNT content for increasing critical current density (J(c)) is in the range 7.5-10%at.

引用

页码：3465 / 3469

页数：5

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