Vortex dynamics in single crystal Hg-1201

M. Baenitz; K. Lüders; D. Maurer; N. Barišić; Y. Cho; Y. Li; G. Yu; X. Zhao; M. Greven

doi:10.1016/j.physc.2009.05.203

Vortex dynamics in single crystal Hg-1201

M. Baenitz, K. Lüders, D. Maurer, N. Barišić, Y. Cho, Y. Li, G. Yu, X. Zhao, M. Greven

Physics and Astronomy (Twin Cities)

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

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Abstract

Anisotropic superconducting materials often show an enhanced pinning along their crystallographic ab-planes. To obtain information about such a behavior of the high-T_c system Hg-1201 (HgBa₂CuO₄) magnetic investigations on a single crystal are performed for the two field orientations, parallel to the c-axis and parallel to the ab-planes. The dependence of the ac magnetization on temperature, magnetic field and frequency is determined. Compared to former results on powder samples of this system no indication of a second peak in the imaginary part of the susceptibility χ′′ is found. It seems to be shifted to higher temperatures overlapping now with the first peak. The corresponding irreversibility lines for both orientations, parallel to c and parallel to ab, are determined and discussed within the framework of a "diffusion" model.

Original language	English (US)
Pages (from-to)	1126-1128
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	469
Issue number	15-20
DOIs	https://doi.org/10.1016/j.physc.2009.05.203
State	Published - Oct 15 2009

Keywords

Flux creep
High-T superconductors
Pinning
Vortex dynamics

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title = "Vortex dynamics in single crystal Hg-1201",

abstract = "Anisotropic superconducting materials often show an enhanced pinning along their crystallographic ab-planes. To obtain information about such a behavior of the high-Tc system Hg-1201 (HgBa2CuO4) magnetic investigations on a single crystal are performed for the two field orientations, parallel to the c-axis and parallel to the ab-planes. The dependence of the ac magnetization on temperature, magnetic field and frequency is determined. Compared to former results on powder samples of this system no indication of a second peak in the imaginary part of the susceptibility χ′′ is found. It seems to be shifted to higher temperatures overlapping now with the first peak. The corresponding irreversibility lines for both orientations, parallel to c and parallel to ab, are determined and discussed within the framework of a {"}diffusion{"} model.",

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AU - Baenitz, M.

AU - Lüders, K.

AU - Maurer, D.

AU - Barišić, N.

AU - Cho, Y.

AU - Li, Y.

AU - Yu, G.

AU - Zhao, X.

AU - Greven, M.

PY - 2009/10/15

Y1 - 2009/10/15

N2 - Anisotropic superconducting materials often show an enhanced pinning along their crystallographic ab-planes. To obtain information about such a behavior of the high-Tc system Hg-1201 (HgBa2CuO4) magnetic investigations on a single crystal are performed for the two field orientations, parallel to the c-axis and parallel to the ab-planes. The dependence of the ac magnetization on temperature, magnetic field and frequency is determined. Compared to former results on powder samples of this system no indication of a second peak in the imaginary part of the susceptibility χ′′ is found. It seems to be shifted to higher temperatures overlapping now with the first peak. The corresponding irreversibility lines for both orientations, parallel to c and parallel to ab, are determined and discussed within the framework of a "diffusion" model.

AB - Anisotropic superconducting materials often show an enhanced pinning along their crystallographic ab-planes. To obtain information about such a behavior of the high-Tc system Hg-1201 (HgBa2CuO4) magnetic investigations on a single crystal are performed for the two field orientations, parallel to the c-axis and parallel to the ab-planes. The dependence of the ac magnetization on temperature, magnetic field and frequency is determined. Compared to former results on powder samples of this system no indication of a second peak in the imaginary part of the susceptibility χ′′ is found. It seems to be shifted to higher temperatures overlapping now with the first peak. The corresponding irreversibility lines for both orientations, parallel to c and parallel to ab, are determined and discussed within the framework of a "diffusion" model.

KW - Flux creep

KW - High-T superconductors

KW - Pinning

KW - Vortex dynamics

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Vortex dynamics in single crystal Hg-1201

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Keywords

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