Irreversibility lines of HgBa2CuO4+δ with different oxygen contents

R. Usami, H. Kubota, R. Puzniak, Chia-Jyi Liu, H. Yamauchi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Single phase HgBa2CuO4+δ samples were annealed in flowing oxygen gas or in flowing argon gas. Oxygen contents of both samples determined by iodometric titrations indicate that the samples annealed in oxygen gas and in argon gas were respectively in over-doped and in under-doped region. Both samples were respectively grain-aligned in magnetic fields. Hysteresis loops for grain-aligned over-doped and under-doped samples were measured in applied fields parallel and perpendicular to the c-axis. Region where irreversibility lines of over-doped sample was located was found to be higher than that of under-doped sample. Irreversibility line of over-doped sample was found to be higher than that of YBa2Cu3O6.6. Anisotropy of irreversibility lines of both samples were found to be smaller than that of Y-123 superconductors.

Original languageEnglish
Pages (from-to)2759-2760
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume235-240
Issue numberPART 4
DOIs
Publication statusPublished - 1994 Jan 1

Fingerprint

Gases
Oxygen
Argon
oxygen
Hysteresis loops
Titration
Superconducting materials
gases
Anisotropy
Magnetic fields
argon
titration
hysteresis
anisotropy
magnetic fields

All Science Journal Classification (ASJC) codes

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

Cite this

Usami, R. ; Kubota, H. ; Puzniak, R. ; Liu, Chia-Jyi ; Yamauchi, H. / Irreversibility lines of HgBa2CuO4+δ with different oxygen contents. In: Physica C: Superconductivity and its applications. 1994 ; Vol. 235-240, No. PART 4. pp. 2759-2760.
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Irreversibility lines of HgBa2CuO4+δ with different oxygen contents. / Usami, R.; Kubota, H.; Puzniak, R.; Liu, Chia-Jyi; Yamauchi, H.

In: Physica C: Superconductivity and its applications, Vol. 235-240, No. PART 4, 01.01.1994, p. 2759-2760.

Research output: Contribution to journalArticle

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T1 - Irreversibility lines of HgBa2CuO4+δ with different oxygen contents

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AU - Kubota, H.

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AB - Single phase HgBa2CuO4+δ samples were annealed in flowing oxygen gas or in flowing argon gas. Oxygen contents of both samples determined by iodometric titrations indicate that the samples annealed in oxygen gas and in argon gas were respectively in over-doped and in under-doped region. Both samples were respectively grain-aligned in magnetic fields. Hysteresis loops for grain-aligned over-doped and under-doped samples were measured in applied fields parallel and perpendicular to the c-axis. Region where irreversibility lines of over-doped sample was located was found to be higher than that of under-doped sample. Irreversibility line of over-doped sample was found to be higher than that of YBa2Cu3O6.6. Anisotropy of irreversibility lines of both samples were found to be smaller than that of Y-123 superconductors.

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