Determination of the microscopic pinning mechanism in high-temperature superconductors

D. Giller; A. Shaulov; Y. Yeshurun

doi:10.1016/s0921-4526(99)02370-4

Determination of the microscopic pinning mechanism in high-temperature superconductors

D. Giller, A. Shaulov, Y. Yeshurun

Department of Physics

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We report on a new, relatively simple, magnetic method to determine the dominant pinning mechanism: Spatial fluctuations of the transition temperature T_c ("δT_c-pinning") or of the charge carrier mean free path ℓ ("δℓ-pinning"). The method is based on measuring the magnetization curves in the range of the second anomalous peak, identifying the field B_ss which signifies the vortex solid-solid transition. The qualitative temperature dependence of B_ss determines the pinning mechanism: B_ss increasing (decreasing) with T indicates δℓ-pinning (δT_c-pinning). Using this method we have determined the pinning mechanism in YBa₂Cu₃O_7-δ and Nd_1.85Ce_0.15CuO_4-δ crystals to be δl-pinning and δT_c-pinning, respectively.

Original language	English
Pages (from-to)	687-688
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	284-288
Issue number	PART I
DOIs	https://doi.org/10.1016/s0921-4526(99)02370-4
State	Published - 2000

Bibliographical note

Funding Information:
This work was partially supported by The Israel Science Foundation founded by the Israel Academy of Sciences and Humanities–Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductivity. Y.Y. and A.S. acknowledge support from the German Israeli Foundation. D.G. acknowledges support from the Clore Foundation.

Funding

This work was partially supported by The Israel Science Foundation founded by the Israel Academy of Sciences and Humanities–Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductivity. Y.Y. and A.S. acknowledge support from the German Israeli Foundation. D.G. acknowledges support from the Clore Foundation.

Funders	Funder number
German Israeli Foundation
Heinrich Hertz Minerva Center
Clore Leadership Programme, Clore Duffield Foundation
Israel Academy of Sciences and Humanities
Israel Science Foundation

Keywords

BiSrCaCuO
NsCeCuO
Pinning
Vortex phase transitions
YBaCuO

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10.1016/s0921-4526(99)02370-4

Cite this

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title = "Determination of the microscopic pinning mechanism in high-temperature superconductors",

abstract = "We report on a new, relatively simple, magnetic method to determine the dominant pinning mechanism: Spatial fluctuations of the transition temperature Tc ({"}δTc-pinning{"}) or of the charge carrier mean free path ℓ ({"}δℓ-pinning{"}). The method is based on measuring the magnetization curves in the range of the second anomalous peak, identifying the field Bss which signifies the vortex solid-solid transition. The qualitative temperature dependence of Bss determines the pinning mechanism: Bss increasing (decreasing) with T indicates δℓ-pinning (δTc-pinning). Using this method we have determined the pinning mechanism in YBa2Cu3O7-δ and Nd1.85Ce0.15CuO4-δ crystals to be δl-pinning and δTc-pinning, respectively.",

keywords = "BiSrCaCuO, NsCeCuO, Pinning, Vortex phase transitions, YBaCuO",

author = "D. Giller and A. Shaulov and Y. Yeshurun",

note = "Funding Information: This work was partially supported by The Israel Science Foundation founded by the Israel Academy of Sciences and Humanities–Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductivity. Y.Y. and A.S. acknowledge support from the German Israeli Foundation. D.G. acknowledges support from the Clore Foundation.",

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doi = "10.1016/s0921-4526(99)02370-4",

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AU - Shaulov, A.

AU - Yeshurun, Y.

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PY - 2000

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N2 - We report on a new, relatively simple, magnetic method to determine the dominant pinning mechanism: Spatial fluctuations of the transition temperature Tc ("δTc-pinning") or of the charge carrier mean free path ℓ ("δℓ-pinning"). The method is based on measuring the magnetization curves in the range of the second anomalous peak, identifying the field Bss which signifies the vortex solid-solid transition. The qualitative temperature dependence of Bss determines the pinning mechanism: Bss increasing (decreasing) with T indicates δℓ-pinning (δTc-pinning). Using this method we have determined the pinning mechanism in YBa2Cu3O7-δ and Nd1.85Ce0.15CuO4-δ crystals to be δl-pinning and δTc-pinning, respectively.

AB - We report on a new, relatively simple, magnetic method to determine the dominant pinning mechanism: Spatial fluctuations of the transition temperature Tc ("δTc-pinning") or of the charge carrier mean free path ℓ ("δℓ-pinning"). The method is based on measuring the magnetization curves in the range of the second anomalous peak, identifying the field Bss which signifies the vortex solid-solid transition. The qualitative temperature dependence of Bss determines the pinning mechanism: Bss increasing (decreasing) with T indicates δℓ-pinning (δTc-pinning). Using this method we have determined the pinning mechanism in YBa2Cu3O7-δ and Nd1.85Ce0.15CuO4-δ crystals to be δl-pinning and δTc-pinning, respectively.

KW - BiSrCaCuO

KW - NsCeCuO

KW - Pinning

KW - Vortex phase transitions

KW - YBaCuO

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - PART I

ER -

Determination of the microscopic pinning mechanism in high-temperature superconductors

Abstract

Bibliographical note

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Keywords

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