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
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

Access to Document

10.1016/S0921-4534(03)01081-5

Cite this

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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",

author = "D. Goto and T. Machi and Y. Zhao and N. Koshizuka and M. Murakami and S. Arai",

note = "Funding Information: This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.; Proceedings of the 15th International Symposium on Superconduc ; Conference date: 11-11-2002 Through 13-11-2002",

year = "2003",

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doi = "10.1016/S0921-4534(03)01081-5",

language = "English",

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pages = "272--275",

journal = "Physica C: Superconductivity and its Applications",

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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

Y1 - 2003/10

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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