Vortex fluctuations in YBa2Cu3O6.5 single crystal: Evidence for 2D→3D crossover

A. Poddar; R. Prozorov; Y. Wolfus; M. Ghinovker; B. Ya Shapiro; A. Shaulov; Y. Yeshurun

doi:10.1016/s0921-4534(97)00712-0

Vortex fluctuations in YBa₂Cu₃O_6.5 single crystal: Evidence for 2D→3D crossover

A. Poddar, R. Prozorov, Y. Wolfus, M. Ghinovker, B. Ya Shapiro, A. Shaulov, Y. Yeshurun

Department of Physics

Bar-Ilan University

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

7 Scopus citations

Abstract

The reversible magnetization M is measured in an YBa₂Cu₃O_6.5 crystal (T_c=45.2 K) as a function of temperature T for various fields H between 0.2 and 3.5 T. All isochamps for H > 1 T intersect at T* _2D≈42.8 K and collapse into a single curve when m = M( H ·T)^{( D-1)/D} is plotted as a function of t-(T-T_c(H))/(H·T)^(D-1)/D where the dimension D=2 ("2D scaling"). Surprisingly, the low field curves also intersect, but at a different temperature T*_3D ≈ 43.4 K, and they obey a 3D scaling.

Original language	English
Pages (from-to)	1299-1300
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	282-287
Issue number	PART 3
DOIs	https://doi.org/10.1016/s0921-4534(97)00712-0
State	Published - Aug 1997

Bibliographical note

Funding Information:
strong fluctuations, where scaling behavior is expected \[1,2\]. The 'width' of such a strip depends strongly on the dimensionality of the system - it is wider for the 2D case. It may happen that the 2D-~3D crossover line appears inside the 2D strong fluctuation region. Such a situation is described schematically in the field-temperature phase diagram of Fig. 5 in which the fluctuating region is shadowed. (The low field Josephson fluctuations region is not shown). Acknowledgments: We are grateful to L. Bulaevskii and V. Kogan for illuminating discussions. This work was partially supported by The Israel Science Foundations and by the Heinrich Hertz Minerva Center for high - temperature superconductivity. Y. Y. Acknowledges support from USA-Israel Binational Science foundation• R. P. Acknowledges support from the Clore Foundations.

Funding

strong fluctuations, where scaling behavior is expected \[1,2\]. The 'width' of such a strip depends strongly on the dimensionality of the system - it is wider for the 2D case. It may happen that the 2D-~3D crossover line appears inside the 2D strong fluctuation region. Such a situation is described schematically in the field-temperature phase diagram of Fig. 5 in which the fluctuating region is shadowed. (The low field Josephson fluctuations region is not shown). Acknowledgments: We are grateful to L. Bulaevskii and V. Kogan for illuminating discussions. This work was partially supported by The Israel Science Foundations and by the Heinrich Hertz Minerva Center for high - temperature superconductivity. Y. Y. Acknowledges support from USA-Israel Binational Science foundation• R. P. Acknowledges support from the Clore Foundations.

Funders	Funder number
Israel Science Foundation
United States-Israel Binational Science Foundation
Heinrich Hertz Minerva Center
Clore Foundations

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10.1016/s0921-4534(97)00712-0

Cite this

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title = "Vortex fluctuations in YBa2Cu3O6.5 single crystal: Evidence for 2D→3D crossover",

abstract = "The reversible magnetization M is measured in an YBa2Cu3O6.5 crystal (Tc=45.2 K) as a function of temperature T for various fields H between 0.2 and 3.5 T. All isochamps for H > 1 T intersect at T* 2D≈42.8 K and collapse into a single curve when m = M( H ·T)( D-1)/D is plotted as a function of t-(T-Tc(H))/(H·T)(D-1)/D where the dimension D=2 ({"}2D scaling{"}). Surprisingly, the low field curves also intersect, but at a different temperature T*3D ≈ 43.4 K, and they obey a 3D scaling.",

author = "A. Poddar and R. Prozorov and Y. Wolfus and M. Ghinovker and Shapiro, {B. Ya} and A. Shaulov and Y. Yeshurun",

note = "Funding Information: strong fluctuations, where scaling behavior is expected \[1,2\]. The 'width' of such a strip depends strongly on the dimensionality of the system - it is wider for the 2D case. It may happen that the 2D-~3D crossover line appears inside the 2D strong fluctuation region. Such a situation is described schematically in the field-temperature phase diagram of Fig. 5 in which the fluctuating region is shadowed. (The low field Josephson fluctuations region is not shown). Acknowledgments: We are grateful to L. Bulaevskii and V. Kogan for illuminating discussions. This work was partially supported by The Israel Science Foundations and by the Heinrich Hertz Minerva Center for high - temperature superconductivity. Y. Y. Acknowledges support from USA-Israel Binational Science foundation• R. P. Acknowledges support from the Clore Foundations.",

year = "1997",

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AU - Ghinovker, M.

AU - Shapiro, B. Ya

AU - Shaulov, A.

AU - Yeshurun, Y.

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N2 - The reversible magnetization M is measured in an YBa2Cu3O6.5 crystal (Tc=45.2 K) as a function of temperature T for various fields H between 0.2 and 3.5 T. All isochamps for H > 1 T intersect at T* 2D≈42.8 K and collapse into a single curve when m = M( H ·T)( D-1)/D is plotted as a function of t-(T-Tc(H))/(H·T)(D-1)/D where the dimension D=2 ("2D scaling"). Surprisingly, the low field curves also intersect, but at a different temperature T*3D ≈ 43.4 K, and they obey a 3D scaling.

AB - The reversible magnetization M is measured in an YBa2Cu3O6.5 crystal (Tc=45.2 K) as a function of temperature T for various fields H between 0.2 and 3.5 T. All isochamps for H > 1 T intersect at T* 2D≈42.8 K and collapse into a single curve when m = M( H ·T)( D-1)/D is plotted as a function of t-(T-Tc(H))/(H·T)(D-1)/D where the dimension D=2 ("2D scaling"). Surprisingly, the low field curves also intersect, but at a different temperature T*3D ≈ 43.4 K, and they obey a 3D scaling.

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