Improvement of critical current density in MgB2 by Ti, Zr and Hf doping

D. Goto; T. Machi; Y. Zhao; N. Koshizuka; M. Murakami; S. Arai

doi:10.1016/S0921-4534(03)01081-5

Improvement of critical current density in MgB₂ by Ti, Zr and Hf doping

D. Goto, T. Machi, Y. Zhao, N. Koshizuka, M. Murakami, S. Arai

Research output: Contribution to journal › Conference article › peer-review

44 Citations (Scopus)

Abstract

Ti, Zr and Hf doped MgB₂ polycrystalline samples have been prepared by using a hot pressing technique. In Ti doped MgB₂, it was found that the optimum concentration of Ti for the critical current density J_c was 5% and J_c value was improved from 1.9×10 ⁵ A/cm² (Ti 0%) to 5.6×10⁵ A/cm ² (Ti 5%) in self-field at 10 K. J_c values were also improved to 5.0×10⁵ A/cm² with 2% Zr doping and to 4.8×10⁵ A/cm² with 1% Hf doping. We found that the improvement of the irreversibility field B_irr with Zr and Hf doping was larger than that of Ti doping.

Original language	English
Pages (from-to)	272-275
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	392-396
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(03)01081-5
Publication status	Published - 2003 Oct 1
Externally published	Yes
Event	Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: 2002 Nov 11 → 2002 Nov 13

Keywords

MgB
Pinning properties
Superconductivity

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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title = "Improvement of critical current density in MgB2 by Ti, Zr and Hf doping",

abstract = "Ti, Zr and Hf doped MgB2 polycrystalline samples have been prepared by using a hot pressing technique. In Ti doped MgB2, it was found that the optimum concentration of Ti for the critical current density Jc was 5% and Jc value was improved from 1.9×10 5 A/cm2 (Ti 0%) to 5.6×105 A/cm 2 (Ti 5%) in self-field at 10 K. Jc values were also improved to 5.0×105 A/cm2 with 2% Zr doping and to 4.8×105 A/cm2 with 1% Hf doping. We found that the improvement of the irreversibility field Birr with Zr and Hf doping was larger than that of Ti doping.",

keywords = "MgB, Pinning properties, Superconductivity",

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TY - JOUR

T1 - Improvement of critical current density in MgB2 by Ti, Zr and Hf doping

AU - Goto, D.

AU - Machi, T.

AU - Zhao, Y.

AU - Koshizuka, N.

AU - Murakami, M.

AU - Arai, S.

PY - 2003/10/1

Y1 - 2003/10/1

N2 - Ti, Zr and Hf doped MgB2 polycrystalline samples have been prepared by using a hot pressing technique. In Ti doped MgB2, it was found that the optimum concentration of Ti for the critical current density Jc was 5% and Jc value was improved from 1.9×10 5 A/cm2 (Ti 0%) to 5.6×105 A/cm 2 (Ti 5%) in self-field at 10 K. Jc values were also improved to 5.0×105 A/cm2 with 2% Zr doping and to 4.8×105 A/cm2 with 1% Hf doping. We found that the improvement of the irreversibility field Birr with Zr and Hf doping was larger than that of Ti doping.

AB - Ti, Zr and Hf doped MgB2 polycrystalline samples have been prepared by using a hot pressing technique. In Ti doped MgB2, it was found that the optimum concentration of Ti for the critical current density Jc was 5% and Jc value was improved from 1.9×10 5 A/cm2 (Ti 0%) to 5.6×105 A/cm 2 (Ti 5%) in self-field at 10 K. Jc values were also improved to 5.0×105 A/cm2 with 2% Zr doping and to 4.8×105 A/cm2 with 1% Hf doping. We found that the improvement of the irreversibility field Birr with Zr and Hf doping was larger than that of Ti doping.

KW - MgB

KW - Pinning properties

KW - Superconductivity

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JO - Physica C: Superconductivity and its Applications

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SN - 0921-4534

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Y2 - 11 November 2002 through 13 November 2002

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