Superconducting nanocomposites: Enhancement of bulk pinning and improvement of intergrain coupling

被引：5

作者：

Prozorov, R ^{[1
]}

Prozorov, T

Snezhko, A

机构：

[1] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA

[2] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA

[3] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2005年 / 15卷 / 02期

关键词：

ferromagnetic nanoparticle; intergrain current; magnesium diboride; vortex pinning;

D O I：

10.1109/TASC.2005.848851

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Heterogeneous sonochemical method was applied for synthesis of novel superconducting nanocomposites consisting of magnetic (and/or nonmagnetic) nanoparticles embedded into the bulk of ceramic superconductors. In addition to in-situ production of the efficient pinning centers, this synthesis method considerably improves the interbrain coupling. Significant enhancement of the magnetic irreversibility is reported for Fe2O3 nanoparticles embedded into the bulk of MgB2 superconductor. Nonmagnetic Mo2O5, nanoparticles also increase pinning strength, but less than magnetic Fe2O3. Detailed magnetization and electron microscopy characterization is presented. Theory of bulk magnetic pinning due to ferromagnetic nanoparticles of finite size embedded into the superconducting matrix is developed.

引用

页码：3277 / 3280

页数：4

共 15 条

[1] FERROMAGNETIC PARTICLES IN A TYPE-2 SUPERCONDUCTOR [J].

ALDEN, TH ;

LIVINGSTON, JD .

JOURNAL OF APPLIED PHYSICS, 1966, 37 (09) :3551-+

[2] MAGNETIC PINNING IN A TYPE-2 SUPERCONDUCTOR [J].

ALDEN, TH ;

LIVINGSTON, JD .

APPLIED PHYSICS LETTERS, 1966, 8 (01) :6-+

[3]

Campbell A.M., 1972, CRITICAL CURRENTS SU

[4] INTERPARTICLE COLLISIONS DRIVEN BY ULTRASOUND [J].

DOKTYCZ, SJ ;

SUSLICK, KS .

SCIENCE, 1990, 247 (4946) :1067-1069

[5] ULTRASOUND EFFECTS ON VARIOUS OXIDES AND CERAMICS - MACROSCOPIC AND MICROSCOPIC ANALYSES [J].

GASGNIER, M ;

ALBERT, L ;

DEROUET, J ;

BEAURY, L .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 115 (02) :532-539

[6] SUPERCONDUCTIVITY IN NIOBIUM CONTAINING FERROMAGNETIC GADOLINIUM OR PARAMAGNETIC YTTRIUM DISPERSIONS [J].

KOCH, CC ;

LOVE, GR .

JOURNAL OF APPLIED PHYSICS, 1969, 40 (09) :3582-&

[7] High-Tc superconducting materials for electric power applications [J].

Larbalestier, D ;

Gurevich, A ;

Feldmann, DM ;

Polyanskii, A .

NATURE, 2001, 414 (6861) :368-377

[8] Flux pinning in a superconductor by an array of submicrometer magnetic dots [J].

Martin, JI ;

Velez, M ;

Nogues, J ;

Schuller, IK .

PHYSICAL REVIEW LETTERS, 1997, 79 (10) :1929-1932

[9] Magnetostatic effect on magnetic flux penetration in superconducting Nb film covered with a micron-size magnetic particle array [J].

Nozaki, Y ;

Otani, Y ;

Runge, K ;

Miyajima, H ;

Pannetier, B ;

Nozieres, JP .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (08) :6599-6601

[10] Effects of high-intensity ultrasound on Bi2Sr2CaCu2O8+x superconductor [J].

Prozorov, T ;

McCarty, B ;

Cai, Z ;

Prozorov, R ;

Suslick, KS .

APPLIED PHYSICS LETTERS, 2004, 85 (16) :3513-3515

← 1 2 →