Thermal depinning of flux lines in HgBa2CuO4 + δ from 199Hg spin-lattice relaxation

B. J. Suh; F. Borsa; J. Sok; D. R. Torgeson; M. Corti; A. Rigamonti; Q. Xiong

doi:10.1103/PhysRevLett.76.1928

Thermal depinning of flux lines in HgBa₂CuO₄ + δ from ¹⁹⁹Hg spin-lattice relaxation

B. J. Suh
, F. Borsa
, J. Sok
, D. R. Torgeson
, M. Corti
, A. Rigamonti
, Q. Xiong

Department of Physics

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

28 Scopus citations

Abstract

¹⁹⁹Hg NMR spin-lattice relaxation rates in an aligned powder sample of the anisotropic high- T_c superconductor HgBa₂CuO_4+δ (Tc = 96 K) show anisotropy in the temperature interval 10-50 K, with an extra contribution present for the external magnetic field parallel to the c axis. The extra contribution shifts with magnetic field in a way related to the irreversibility temperature Tirr, indicating that the thermal motion of flux lines (FL’s) is the cause of the extra relaxation. A simple model is presented to analyze the relaxation data and to extract values for the correlation time τc and the effective activation energy U of the FL motion.

Original language	English
Pages (from-to)	1928-1931
Number of pages	4
Journal	Physical Review Letters
Volume	76
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.76.1928
State	Published - 11 Mar 1996

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10.1103/PhysRevLett.76.1928

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title = "Thermal depinning of flux lines in HgBa2CuO4 + δ from 199Hg spin-lattice relaxation",

abstract = "199Hg NMR spin-lattice relaxation rates in an aligned powder sample of the anisotropic high- Tc superconductor HgBa2CuO4+δ (Tc = 96 K) show anisotropy in the temperature interval 10-50 K, with an extra contribution present for the external magnetic field parallel to the c axis. The extra contribution shifts with magnetic field in a way related to the irreversibility temperature Tirr, indicating that the thermal motion of flux lines (FL{\textquoteright}s) is the cause of the extra relaxation. A simple model is presented to analyze the relaxation data and to extract values for the correlation time τc and the effective activation energy U of the FL motion.",

author = "Suh, \{B. J.\} and F. Borsa and J. Sok and Torgeson, \{D. R.\} and M. Corti and A. Rigamonti and Q. Xiong",

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T1 - Thermal depinning of flux lines in HgBa2CuO4 + δ from 199Hg spin-lattice relaxation

AU - Suh, B. J.

AU - Borsa, F.

AU - Sok, J.

AU - Torgeson, D. R.

AU - Corti, M.

AU - Rigamonti, A.

AU - Xiong, Q.

PY - 1996/3/11

Y1 - 1996/3/11

N2 - 199Hg NMR spin-lattice relaxation rates in an aligned powder sample of the anisotropic high- Tc superconductor HgBa2CuO4+δ (Tc = 96 K) show anisotropy in the temperature interval 10-50 K, with an extra contribution present for the external magnetic field parallel to the c axis. The extra contribution shifts with magnetic field in a way related to the irreversibility temperature Tirr, indicating that the thermal motion of flux lines (FL’s) is the cause of the extra relaxation. A simple model is presented to analyze the relaxation data and to extract values for the correlation time τc and the effective activation energy U of the FL motion.

AB - 199Hg NMR spin-lattice relaxation rates in an aligned powder sample of the anisotropic high- Tc superconductor HgBa2CuO4+δ (Tc = 96 K) show anisotropy in the temperature interval 10-50 K, with an extra contribution present for the external magnetic field parallel to the c axis. The extra contribution shifts with magnetic field in a way related to the irreversibility temperature Tirr, indicating that the thermal motion of flux lines (FL’s) is the cause of the extra relaxation. A simple model is presented to analyze the relaxation data and to extract values for the correlation time τc and the effective activation energy U of the FL motion.

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DO - 10.1103/PhysRevLett.76.1928

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SN - 0031-9007

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SP - 1928

EP - 1931

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

ER -

Thermal depinning of flux lines in HgBa₂CuO₄ + δ from ¹⁹⁹Hg spin-lattice relaxation

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