The effect of Pb doping in HgBa2Ca2Cu3O8+δ superconductor

Kazuyuki Isawa, Ayako Yamamoto, Makoto Itoh, Seiji Adachi, H. Yamauchi

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Polycrystalline samples with the starting compositions of (Hg0.8Pb0.2)xBa2Ca2Cu3O8+δ (1.0≤x≤2.5) were prepared under various synthetic conditions. Both powder X-ray-diffraction analysis and energy dispersive X-ray spectroscopy revealed that the Pb ions were successfully doped into the Hg-1223 phase. High-quality Pb-doped Hg-1223 samples for the starting composition with x=1.5 were obtained when heated at 675°C only for 1 h. The resistivity (ρ{variant}) of such a sample was low, being ∼8×103 Ω cm at 300 K, and the ρ{variant} versus T curve was linearly extrapolated to zero resistance at 0 K, being similar to the cases of high-quality high-Tc cuprates. The zero resistance due to superconductivity started at 122.2 K. When the sample was reduced in flowing argon gas, it exhibited a Meissner signal below 132 K and its Meissner volume fraction exceeded 20% at 5 K. According to thermoelectric power measurements, the carrier density in the sample was reversibly dependent on the oxygen partial pressure, and the sample post-annealed in flowing oxygen gas was likely overdoped.

Original languageEnglish
Pages (from-to)11-15
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume217
Issue number1-2
DOIs
Publication statusPublished - 1993 Nov 10
Externally publishedYes

Fingerprint

Superconducting materials
Gases
Doping (additives)
Oxygen
Argon
Thermoelectric power
Superconductivity
Chemical analysis
Partial pressure
X ray diffraction analysis
Carrier concentration
Volume fraction
Ions
Powders
oxygen
gases
cuprates
partial pressure
x rays
superconductivity

ASJC Scopus subject areas

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

Cite this

The effect of Pb doping in HgBa2Ca2Cu3O8+δ superconductor. / Isawa, Kazuyuki; Yamamoto, Ayako; Itoh, Makoto; Adachi, Seiji; Yamauchi, H.

In: Physica C: Superconductivity and its Applications, Vol. 217, No. 1-2, 10.11.1993, p. 11-15.

Research output: Contribution to journalArticle

Isawa, Kazuyuki ; Yamamoto, Ayako ; Itoh, Makoto ; Adachi, Seiji ; Yamauchi, H. / The effect of Pb doping in HgBa2Ca2Cu3O8+δ superconductor. In: Physica C: Superconductivity and its Applications. 1993 ; Vol. 217, No. 1-2. pp. 11-15.
@article{8e569c9fbe3f48d58d2e40a2692a98f2,
title = "The effect of Pb doping in HgBa2Ca2Cu3O8+δ superconductor",
abstract = "Polycrystalline samples with the starting compositions of (Hg0.8Pb0.2)xBa2Ca2Cu3O8+δ (1.0≤x≤2.5) were prepared under various synthetic conditions. Both powder X-ray-diffraction analysis and energy dispersive X-ray spectroscopy revealed that the Pb ions were successfully doped into the Hg-1223 phase. High-quality Pb-doped Hg-1223 samples for the starting composition with x=1.5 were obtained when heated at 675°C only for 1 h. The resistivity (ρ{variant}) of such a sample was low, being ∼8×103 Ω cm at 300 K, and the ρ{variant} versus T curve was linearly extrapolated to zero resistance at 0 K, being similar to the cases of high-quality high-Tc cuprates. The zero resistance due to superconductivity started at 122.2 K. When the sample was reduced in flowing argon gas, it exhibited a Meissner signal below 132 K and its Meissner volume fraction exceeded 20{\%} at 5 K. According to thermoelectric power measurements, the carrier density in the sample was reversibly dependent on the oxygen partial pressure, and the sample post-annealed in flowing oxygen gas was likely overdoped.",
author = "Kazuyuki Isawa and Ayako Yamamoto and Makoto Itoh and Seiji Adachi and H. Yamauchi",
year = "1993",
month = "11",
day = "10",
doi = "10.1016/0921-4534(93)90788-R",
language = "English",
volume = "217",
pages = "11--15",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - The effect of Pb doping in HgBa2Ca2Cu3O8+δ superconductor

AU - Isawa, Kazuyuki

AU - Yamamoto, Ayako

AU - Itoh, Makoto

AU - Adachi, Seiji

AU - Yamauchi, H.

PY - 1993/11/10

Y1 - 1993/11/10

N2 - Polycrystalline samples with the starting compositions of (Hg0.8Pb0.2)xBa2Ca2Cu3O8+δ (1.0≤x≤2.5) were prepared under various synthetic conditions. Both powder X-ray-diffraction analysis and energy dispersive X-ray spectroscopy revealed that the Pb ions were successfully doped into the Hg-1223 phase. High-quality Pb-doped Hg-1223 samples for the starting composition with x=1.5 were obtained when heated at 675°C only for 1 h. The resistivity (ρ{variant}) of such a sample was low, being ∼8×103 Ω cm at 300 K, and the ρ{variant} versus T curve was linearly extrapolated to zero resistance at 0 K, being similar to the cases of high-quality high-Tc cuprates. The zero resistance due to superconductivity started at 122.2 K. When the sample was reduced in flowing argon gas, it exhibited a Meissner signal below 132 K and its Meissner volume fraction exceeded 20% at 5 K. According to thermoelectric power measurements, the carrier density in the sample was reversibly dependent on the oxygen partial pressure, and the sample post-annealed in flowing oxygen gas was likely overdoped.

AB - Polycrystalline samples with the starting compositions of (Hg0.8Pb0.2)xBa2Ca2Cu3O8+δ (1.0≤x≤2.5) were prepared under various synthetic conditions. Both powder X-ray-diffraction analysis and energy dispersive X-ray spectroscopy revealed that the Pb ions were successfully doped into the Hg-1223 phase. High-quality Pb-doped Hg-1223 samples for the starting composition with x=1.5 were obtained when heated at 675°C only for 1 h. The resistivity (ρ{variant}) of such a sample was low, being ∼8×103 Ω cm at 300 K, and the ρ{variant} versus T curve was linearly extrapolated to zero resistance at 0 K, being similar to the cases of high-quality high-Tc cuprates. The zero resistance due to superconductivity started at 122.2 K. When the sample was reduced in flowing argon gas, it exhibited a Meissner signal below 132 K and its Meissner volume fraction exceeded 20% at 5 K. According to thermoelectric power measurements, the carrier density in the sample was reversibly dependent on the oxygen partial pressure, and the sample post-annealed in flowing oxygen gas was likely overdoped.

UR - http://www.scopus.com/inward/record.url?scp=0027699494&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027699494&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(93)90788-R

DO - 10.1016/0921-4534(93)90788-R

M3 - Article

VL - 217

SP - 11

EP - 15

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 1-2

ER -