Superconducting and magnetic characteristics in the multilayered high-(formula presented) cuprates (formula presented) with (formula presented) probed by Cu and Tl NMR: High value for (formula presented)

H. Kotegawa, Y. Tokunaga, K. Ishida, Guo-Qing Zheng, Y. Kitaoka, A. Iyo, Y. Tanaka, H. Ihara

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Abstract

We report (formula presented) and (formula presented) nuclear magnetic resonance (NMR) measurements on trilayered high-(formula presented) compounds (formula presented) (Tl-1223) that were synthesized at a high pressure and exhibits a high value of superconducting (SC) transition temperature (formula presented) In the SC state, the nuclear spin-lattice relaxation rate (formula presented) reveals a (formula presented) behavior below (formula presented) followed by a (formula presented) behavior at very low temperatures. The results are accounted for by the d-wave pairing model where the presence of the residual density of the states (formula presented) is incorporated at the Fermi level to be consistent with the experiments. The important finding is that the size [in (formula presented) is much smaller for the present compounds of Tl-1223 with (formula presented) than for the previous Tl-2223. Correspondingly, it is shown that an NMR intensity at a satellite peak in the Tl-NMR spectrum, which originates from a possible substitution of Tl for Ca, is much smaller for the former than for the latter. The synthesis technique at a high pressure is found to be a good way to remove such a crystal imperfection due to Tl/Ca intersubstitution. We have demonstrated from a microscopic point of view that as a result of decreasing the degree of disorder effect, the (formula presented) in Tl-1223 has revealed a value higher than 130 K.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number18
DOIs
Publication statusPublished - Jan 1 2002
Externally publishedYes

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cuprates
Nuclear magnetic resonance
nuclear magnetic resonance
Magnetic resonance measurement
Spin-lattice relaxation
Fermi level
Superconducting transition temperature
Substitution reactions
Satellites
Defects
Crystals
Experiments
Temperature
spin-lattice relaxation
nuclear spin
transition temperature
disorders
substitutes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

@article{1284ee520952431ca807f62c3588e268,
title = "Superconducting and magnetic characteristics in the multilayered high-(formula presented) cuprates (formula presented) with (formula presented) probed by Cu and Tl NMR: High value for (formula presented)",
abstract = "We report (formula presented) and (formula presented) nuclear magnetic resonance (NMR) measurements on trilayered high-(formula presented) compounds (formula presented) (Tl-1223) that were synthesized at a high pressure and exhibits a high value of superconducting (SC) transition temperature (formula presented) In the SC state, the nuclear spin-lattice relaxation rate (formula presented) reveals a (formula presented) behavior below (formula presented) followed by a (formula presented) behavior at very low temperatures. The results are accounted for by the d-wave pairing model where the presence of the residual density of the states (formula presented) is incorporated at the Fermi level to be consistent with the experiments. The important finding is that the size [in (formula presented) is much smaller for the present compounds of Tl-1223 with (formula presented) than for the previous Tl-2223. Correspondingly, it is shown that an NMR intensity at a satellite peak in the Tl-NMR spectrum, which originates from a possible substitution of Tl for Ca, is much smaller for the former than for the latter. The synthesis technique at a high pressure is found to be a good way to remove such a crystal imperfection due to Tl/Ca intersubstitution. We have demonstrated from a microscopic point of view that as a result of decreasing the degree of disorder effect, the (formula presented) in Tl-1223 has revealed a value higher than 130 K.",
author = "H. Kotegawa and Y. Tokunaga and K. Ishida and Guo-Qing Zheng and Y. Kitaoka and A. Iyo and Y. Tanaka and H. Ihara",
year = "2002",
month = "1",
day = "1",
doi = "10.1103/PhysRevB.65.184504",
language = "English",
volume = "65",
pages = "1--4",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
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TY - JOUR

T1 - Superconducting and magnetic characteristics in the multilayered high-(formula presented) cuprates (formula presented) with (formula presented) probed by Cu and Tl NMR

T2 - High value for (formula presented)

AU - Kotegawa, H.

AU - Tokunaga, Y.

AU - Ishida, K.

AU - Zheng, Guo-Qing

AU - Kitaoka, Y.

AU - Iyo, A.

AU - Tanaka, Y.

AU - Ihara, H.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - We report (formula presented) and (formula presented) nuclear magnetic resonance (NMR) measurements on trilayered high-(formula presented) compounds (formula presented) (Tl-1223) that were synthesized at a high pressure and exhibits a high value of superconducting (SC) transition temperature (formula presented) In the SC state, the nuclear spin-lattice relaxation rate (formula presented) reveals a (formula presented) behavior below (formula presented) followed by a (formula presented) behavior at very low temperatures. The results are accounted for by the d-wave pairing model where the presence of the residual density of the states (formula presented) is incorporated at the Fermi level to be consistent with the experiments. The important finding is that the size [in (formula presented) is much smaller for the present compounds of Tl-1223 with (formula presented) than for the previous Tl-2223. Correspondingly, it is shown that an NMR intensity at a satellite peak in the Tl-NMR spectrum, which originates from a possible substitution of Tl for Ca, is much smaller for the former than for the latter. The synthesis technique at a high pressure is found to be a good way to remove such a crystal imperfection due to Tl/Ca intersubstitution. We have demonstrated from a microscopic point of view that as a result of decreasing the degree of disorder effect, the (formula presented) in Tl-1223 has revealed a value higher than 130 K.

AB - We report (formula presented) and (formula presented) nuclear magnetic resonance (NMR) measurements on trilayered high-(formula presented) compounds (formula presented) (Tl-1223) that were synthesized at a high pressure and exhibits a high value of superconducting (SC) transition temperature (formula presented) In the SC state, the nuclear spin-lattice relaxation rate (formula presented) reveals a (formula presented) behavior below (formula presented) followed by a (formula presented) behavior at very low temperatures. The results are accounted for by the d-wave pairing model where the presence of the residual density of the states (formula presented) is incorporated at the Fermi level to be consistent with the experiments. The important finding is that the size [in (formula presented) is much smaller for the present compounds of Tl-1223 with (formula presented) than for the previous Tl-2223. Correspondingly, it is shown that an NMR intensity at a satellite peak in the Tl-NMR spectrum, which originates from a possible substitution of Tl for Ca, is much smaller for the former than for the latter. The synthesis technique at a high pressure is found to be a good way to remove such a crystal imperfection due to Tl/Ca intersubstitution. We have demonstrated from a microscopic point of view that as a result of decreasing the degree of disorder effect, the (formula presented) in Tl-1223 has revealed a value higher than 130 K.

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