Critical current densities and flux creep rate in Co-doped BaFe 2As2 with columnar defects introduced by heavy-ion irradiation

Y. Nakajima; Y. Tsuchiya; T. Taen; H. Yagyuda; T. Tamegai; S. Okayasu; M. Sasase; H. Kitamura; T. Murakami

doi:10.1016/j.physc.2010.05.047

Critical current densities and flux creep rate in Co-doped BaFe ₂As₂ with columnar defects introduced by heavy-ion irradiation

Y. Nakajima, Y. Tsuchiya, T. Taen, H. Yagyuda, T. Tamegai, S. Okayasu, M. Sasase, H. Kitamura, T. Murakami

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We report the formation of columnar defects in Co-doped BaFe ₂As₂ single crystals with different heavyion irradiations. The formation of columnar defects by 200 MeV Au ion irradiation is confirmed by transmission electron microscopy and their density is about 40% of the irradiation dose. Magneto-optical imaging and bulk magnetization measurements reveal that the critical current density J_c is enhanced in the 200 MeV Au and 800 MeV Xe ion irradiated samples while J_c is unchanged in the 200 MeV Ni ion irradiated sample. We also find that vortex creep rates are strongly suppressed by the columnar defects. We compare the effect of heavy-ion irradiation into Co-doped BaFe₂As₂ and cuprate superconductors.

Original language	English
Pages (from-to)	1103-1105
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	20
DOIs	https://doi.org/10.1016/j.physc.2010.05.047
Publication status	Published - 2010 Nov 1
Externally published	Yes

Keywords

Critical current density
Flux creep
Iron-pnictide superconductor

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/j.physc.2010.05.047

Cite this

Nakajima, Y, Tsuchiya, Y, Taen, T, Yagyuda, H, Tamegai, T, Okayasu, S, Sasase, M, Kitamura, H & Murakami, T 2010, 'Critical current densities and flux creep rate in Co-doped BaFe ₂As₂ with columnar defects introduced by heavy-ion irradiation', Physica C: Superconductivity and its applications, vol. 470, no. 20, pp. 1103-1105. https://doi.org/10.1016/j.physc.2010.05.047

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title = "Critical current densities and flux creep rate in Co-doped BaFe 2As2 with columnar defects introduced by heavy-ion irradiation",

abstract = "We report the formation of columnar defects in Co-doped BaFe 2As2 single crystals with different heavyion irradiations. The formation of columnar defects by 200 MeV Au ion irradiation is confirmed by transmission electron microscopy and their density is about 40% of the irradiation dose. Magneto-optical imaging and bulk magnetization measurements reveal that the critical current density Jc is enhanced in the 200 MeV Au and 800 MeV Xe ion irradiated samples while Jc is unchanged in the 200 MeV Ni ion irradiated sample. We also find that vortex creep rates are strongly suppressed by the columnar defects. We compare the effect of heavy-ion irradiation into Co-doped BaFe2As2 and cuprate superconductors.",

keywords = "Critical current density, Flux creep, Iron-pnictide superconductor",

author = "Y. Nakajima and Y. Tsuchiya and T. Taen and H. Yagyuda and T. Tamegai and S. Okayasu and M. Sasase and H. Kitamura and T. Murakami",

note = "Funding Information: This work is partly supported by a Grant-in-Aid for Scientific Research from MEXT, Japan and is one of the research projects with heavy ions at NIRS-HIMAC.",

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T1 - Critical current densities and flux creep rate in Co-doped BaFe 2As2 with columnar defects introduced by heavy-ion irradiation

AU - Nakajima, Y.

AU - Tsuchiya, Y.

AU - Taen, T.

AU - Yagyuda, H.

AU - Tamegai, T.

AU - Okayasu, S.

AU - Sasase, M.

AU - Kitamura, H.

AU - Murakami, T.

N1 - Funding Information: This work is partly supported by a Grant-in-Aid for Scientific Research from MEXT, Japan and is one of the research projects with heavy ions at NIRS-HIMAC.

PY - 2010/11/1

Y1 - 2010/11/1

N2 - We report the formation of columnar defects in Co-doped BaFe 2As2 single crystals with different heavyion irradiations. The formation of columnar defects by 200 MeV Au ion irradiation is confirmed by transmission electron microscopy and their density is about 40% of the irradiation dose. Magneto-optical imaging and bulk magnetization measurements reveal that the critical current density Jc is enhanced in the 200 MeV Au and 800 MeV Xe ion irradiated samples while Jc is unchanged in the 200 MeV Ni ion irradiated sample. We also find that vortex creep rates are strongly suppressed by the columnar defects. We compare the effect of heavy-ion irradiation into Co-doped BaFe2As2 and cuprate superconductors.

AB - We report the formation of columnar defects in Co-doped BaFe 2As2 single crystals with different heavyion irradiations. The formation of columnar defects by 200 MeV Au ion irradiation is confirmed by transmission electron microscopy and their density is about 40% of the irradiation dose. Magneto-optical imaging and bulk magnetization measurements reveal that the critical current density Jc is enhanced in the 200 MeV Au and 800 MeV Xe ion irradiated samples while Jc is unchanged in the 200 MeV Ni ion irradiated sample. We also find that vortex creep rates are strongly suppressed by the columnar defects. We compare the effect of heavy-ion irradiation into Co-doped BaFe2As2 and cuprate superconductors.

KW - Critical current density

KW - Flux creep

KW - Iron-pnictide superconductor

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