Kinetic Energy Density Induced by High Magnetic Fields in a Bi-2212 Single Crystal

被引：0

作者：

de Almeida, Moises Leonardi ^{[1
]}

Pureur, Paulo ^{[1
]}

Dias, Fabio Teixeira ^{[2
]}

Vieira, Valdemar das Neves ^{[2
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Fed Pelotas, Dept Fis, BR-96010900 Pelotas, RS, Brazil

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2015年 / 28卷 / 02期

关键词：

Kinetic energy density; Vortex lattice; Magnetization; Virial theorem; CONDENSATE;

D O I：

10.1007/s10948-014-2755-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured isofield curves for the kinetic energy density (E (k)) in the superconducting state of a Bi2Sr2CaCu2O8+delta (Bi-2212) single crystal. These curves were determined from magnetization versus temperature experiments that were analyzed according to the prescription of the virial theorem of superconductivity. The magnetization measurements were carried out using the zero field cooling (ZFC) and field cooled cooling (FCC) protocols. This procedure allows the determination of the temperature interval where the magnetization behaves reversibly. This study is limited to the temperature region where the pinning effects are negligible. The field-induced kinetic energy is associated with the currents circulating around the vortices. The obtained results allow the estimation of the upper critical field and are in accordance to the expectations of the Abrikosov theory for type-II superconductors.

引用

页码：411 / 414

页数：4

共 11 条

[1]

Cyrot M., 1992, Introduction to Superconductivity and High-Tc Materials

[2] Kinetic energy change with doping upon superfluid condensation in high-temperature superconductors [J].

Deutscher, G ;

Santander-Syro, AF ;

Bontemps, N .

PHYSICAL REVIEW B, 2005, 72 (09)

[3]

Doria M., 2007, PHYS REV B, V76

[4] The Kinetic Energy of the Condensate in the Presence of an External Applied [J].

Doria, Mauro M. .

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2009, 22 (03) :235-238

[5] VIRIAL-THEOREM FOR GINZBURG-LANDAU THEORIES WITH POTENTIAL APPLICATIONS TO NUMERICAL-STUDIES OF TYPE-II SUPERCONDUCTORS [J].

DORIA, MM ;

GUBERNATIS, JE ;

RAINER, D .

PHYSICAL REVIEW B, 1989, 39 (13) :9573-9575

[6] Average kinetic energy of the superconducting state [J].

Doria, MM ;

Salem-Sugui, S ;

de Oliveira, IG ;

Ghivelder, L ;

Brandt, EH .

PHYSICAL REVIEW B, 2002, 65 (14) :1-6

[7] Growth of Bi2Sr2CaCu2Oy single crystals by a self-flux method using precursors [J].

Kishida, S ;

Hosokawa, E ;

Liang, WY .

JOURNAL OF CRYSTAL GROWTH, 1999, 205 (03) :284-288

[8] Superconductivity-induced transfer of in-plane spectral weight in Bi2Sr2Ca2O8+δ [J].

Molegraaf, HJA ;

Presura, C ;

van der Marel, D ;

Kes, PH ;

Li, M .

SCIENCE, 2002, 295 (5563) :2239-2241

[9] Anisotropy of the field-induced kinetic energy density in Bi2212 [J].

Pena, J. P. ;

da Silva, R. R. ;

Pureur, P. .

PHYSICA B-CONDENSED MATTER, 2014, 433 :79-83

[10] Magnetic Measurements and Kinetic Energy of the Superconducting Condensate in SmBa2Cu3O7-δ [J].

Pena, J. P. ;

Martinez, D. B. ;

Parra Vargas, C. A. ;

Cunha, A. G. ;

Pimentel, J. L., Jr. ;

Pureur, P. .

BRAZILIAN JOURNAL OF PHYSICS, 2013, 43 (1-2) :22-27

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