Magnetic-field enhancement of 63Cu and 17O relaxation rates in the mixed state of YBa2Cu4O8 observation of fermi-liquid state in the vortex cores

Guo qing Zheng; Yoshio Kitaoka; Kunisuke Asayama; Yasuharu Kodama

doi:10.1016/0921-4534(94)90370-0

Magnetic-field enhancement of ⁶³Cu and ¹⁷O relaxation rates in the mixed state of YBa₂Cu₄O₈ observation of fermi-liquid state in the vortex cores

Guo qing Zheng, Yoshio Kitaoka, Kunisuke Asayama, Yasuharu Kodama

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

13 Citations (Scopus)

Abstract

The ⁶³Cu and ¹⁷O nuclear spin-lattice relaxation rates in YBa₂Cu₄O₈ have been measured in the temperature and magnetic field ranges of 1.4-270 K and 4.0-11 T, respectively. In the mixed state, 1/T₁ for both ⁶³Cu and ¹⁷O are enhanced by the magnetic field. Most strikingly, in a high field of 11 T, ⁶³(1/T₁) and ¹⁷(1/T₁) decrease in proportion to the temperature, T, below T=15 K and T=10 K, respectively. The magnetic-field dependence of 1/T₁ is shown to be dominated by spin diffusion to the vortex cores, implying that the electronic state in the cores is characterized by the T₁T=const. law. This result indicates that the electronic state in the vortex cores is described in terms of the Fermi-liquid picture, in sharp contrast to the unusual properties above T_c.

Original language	English
Pages (from-to)	169-175
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	227
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(94)90370-0
Publication status	Published - Jun 20 1994
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(94)90370-0

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Magnetic-field enhancement of ⁶³Cu and ¹⁷O relaxation rates in the mixed state of YBa₂Cu₄O₈ observation of fermi-liquid state in the vortex cores. / Zheng, Guo qing; Kitaoka, Yoshio; Asayama, Kunisuke et al.

In: Physica C: Superconductivity and its applications, Vol. 227, No. 1-2, 20.06.1994, p. 169-175.

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

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title = "Magnetic-field enhancement of 63Cu and 17O relaxation rates in the mixed state of YBa2Cu4O8 observation of fermi-liquid state in the vortex cores",

abstract = "The 63Cu and 17O nuclear spin-lattice relaxation rates in YBa2Cu4O8 have been measured in the temperature and magnetic field ranges of 1.4-270 K and 4.0-11 T, respectively. In the mixed state, 1/T1 for both 63Cu and 17O are enhanced by the magnetic field. Most strikingly, in a high field of 11 T, 63(1/T1) and 17(1/T1) decrease in proportion to the temperature, T, below T=15 K and T=10 K, respectively. The magnetic-field dependence of 1/T1 is shown to be dominated by spin diffusion to the vortex cores, implying that the electronic state in the cores is characterized by the T1T=const. law. This result indicates that the electronic state in the vortex cores is described in terms of the Fermi-liquid picture, in sharp contrast to the unusual properties above Tc.",

author = "Zheng, {Guo qing} and Yoshio Kitaoka and Kunisuke Asayama and Yasuharu Kodama",

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T1 - Magnetic-field enhancement of 63Cu and 17O relaxation rates in the mixed state of YBa2Cu4O8 observation of fermi-liquid state in the vortex cores

AU - Zheng, Guo qing

AU - Kitaoka, Yoshio

AU - Asayama, Kunisuke

AU - Kodama, Yasuharu

PY - 1994/6/20

Y1 - 1994/6/20

N2 - The 63Cu and 17O nuclear spin-lattice relaxation rates in YBa2Cu4O8 have been measured in the temperature and magnetic field ranges of 1.4-270 K and 4.0-11 T, respectively. In the mixed state, 1/T1 for both 63Cu and 17O are enhanced by the magnetic field. Most strikingly, in a high field of 11 T, 63(1/T1) and 17(1/T1) decrease in proportion to the temperature, T, below T=15 K and T=10 K, respectively. The magnetic-field dependence of 1/T1 is shown to be dominated by spin diffusion to the vortex cores, implying that the electronic state in the cores is characterized by the T1T=const. law. This result indicates that the electronic state in the vortex cores is described in terms of the Fermi-liquid picture, in sharp contrast to the unusual properties above Tc.

AB - The 63Cu and 17O nuclear spin-lattice relaxation rates in YBa2Cu4O8 have been measured in the temperature and magnetic field ranges of 1.4-270 K and 4.0-11 T, respectively. In the mixed state, 1/T1 for both 63Cu and 17O are enhanced by the magnetic field. Most strikingly, in a high field of 11 T, 63(1/T1) and 17(1/T1) decrease in proportion to the temperature, T, below T=15 K and T=10 K, respectively. The magnetic-field dependence of 1/T1 is shown to be dominated by spin diffusion to the vortex cores, implying that the electronic state in the cores is characterized by the T1T=const. law. This result indicates that the electronic state in the vortex cores is described in terms of the Fermi-liquid picture, in sharp contrast to the unusual properties above Tc.

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Magnetic-field enhancement of ⁶³Cu and ¹⁷O relaxation rates in the mixed state of YBa₂Cu₄O₈ observation of fermi-liquid state in the vortex cores

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