Anisotropy of magnetic critical current density in HgBa2CuO4+δ

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

Anisotropy of magnetic critical current density in HgBa₂CuO_4+δ

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

Department of Physics

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

The anisotropy of magnetic critical current density in HgBa₂CuO_4+δ has been investigated. HgBa₂CuO_4+δ was synthesized from the mixed powders of HgO, BaO and CuO in evacuated quartz tube at 750°C for 1h. As-prepared HgBa₂CuO_4+δ was annealed in flowing argon at 300°C for 6h. Pulverized sample was aligned by a magnetic field of 8T in resin. The M-H loop measurements of magnetically aligned crystalline HgBa₂CuO_4+d were performed at 4.2K. The width of hysteresis loop, ΔM_ab in the a-b plane and ΔM_c along the c-axis, were calculated. The anisotropy of the width of hysteresis loop was observed, 1.6≤ΔM_cor ^ab/ΔM_cor ^c≤3.1 in magnetic field up to 9T. The critical current densities, J_c^ab in the a-b plane and J_c^c along the c-axis, were determined. The J_c^ab at 4.2K in 1T was found to be equal to 1.6×10⁶ A/cm².

Original language	English
Pages (from-to)	89-92
Number of pages	4
Journal	Denshi Gijutsu Sogo Kenkyusho Iho/Bulletin of the Electrotechnical Laboratory
Volume	58
Issue number	6
Publication status	Published - 1994 Dec 1

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering

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Usami, R., Puzniak, R., Kubota, H., Liu, C-J., & Yamauchi, H. (1994). Anisotropy of magnetic critical current density in HgBa₂CuO_4+δ. Denshi Gijutsu Sogo Kenkyusho Iho/Bulletin of the Electrotechnical Laboratory, 58(6), 89-92.

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title = "Anisotropy of magnetic critical current density in HgBa2CuO4+δ",

abstract = "The anisotropy of magnetic critical current density in HgBa2CuO4+δ has been investigated. HgBa2CuO4+δ was synthesized from the mixed powders of HgO, BaO and CuO in evacuated quartz tube at 750°C for 1h. As-prepared HgBa2CuO4+δ was annealed in flowing argon at 300°C for 6h. Pulverized sample was aligned by a magnetic field of 8T in resin. The M-H loop measurements of magnetically aligned crystalline HgBa2CuO4+d were performed at 4.2K. The width of hysteresis loop, ΔMab in the a-b plane and ΔMc along the c-axis, were calculated. The anisotropy of the width of hysteresis loop was observed, 1.6≤ΔMcor ab/ΔMcor c≤3.1 in magnetic field up to 9T. The critical current densities, Jcab in the a-b plane and Jcc along the c-axis, were determined. The Jcab at 4.2K in 1T was found to be equal to 1.6×106 A/cm2.",

author = "R. Usami and R. Puzniak and H. Kubota and Chia-Jyi Liu and H. Yamauchi",

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AU - Usami, R.

AU - Puzniak, R.

AU - Kubota, H.

AU - Liu, Chia-Jyi

AU - Yamauchi, H.

PY - 1994/12/1

Y1 - 1994/12/1

N2 - The anisotropy of magnetic critical current density in HgBa2CuO4+δ has been investigated. HgBa2CuO4+δ was synthesized from the mixed powders of HgO, BaO and CuO in evacuated quartz tube at 750°C for 1h. As-prepared HgBa2CuO4+δ was annealed in flowing argon at 300°C for 6h. Pulverized sample was aligned by a magnetic field of 8T in resin. The M-H loop measurements of magnetically aligned crystalline HgBa2CuO4+d were performed at 4.2K. The width of hysteresis loop, ΔMab in the a-b plane and ΔMc along the c-axis, were calculated. The anisotropy of the width of hysteresis loop was observed, 1.6≤ΔMcor ab/ΔMcor c≤3.1 in magnetic field up to 9T. The critical current densities, Jcab in the a-b plane and Jcc along the c-axis, were determined. The Jcab at 4.2K in 1T was found to be equal to 1.6×106 A/cm2.

AB - The anisotropy of magnetic critical current density in HgBa2CuO4+δ has been investigated. HgBa2CuO4+δ was synthesized from the mixed powders of HgO, BaO and CuO in evacuated quartz tube at 750°C for 1h. As-prepared HgBa2CuO4+δ was annealed in flowing argon at 300°C for 6h. Pulverized sample was aligned by a magnetic field of 8T in resin. The M-H loop measurements of magnetically aligned crystalline HgBa2CuO4+d were performed at 4.2K. The width of hysteresis loop, ΔMab in the a-b plane and ΔMc along the c-axis, were calculated. The anisotropy of the width of hysteresis loop was observed, 1.6≤ΔMcor ab/ΔMcor c≤3.1 in magnetic field up to 9T. The critical current densities, Jcab in the a-b plane and Jcc along the c-axis, were determined. The Jcab at 4.2K in 1T was found to be equal to 1.6×106 A/cm2.

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