Quasi-periodic magnetic flux jumps in the superconducting state of Ba 0.5K0.5Fe1.9M0.1As2 (M = Fe, Co, Ni, Cu, and Zn)

J. Li; Y. Guo; S. Zhang; Y. Tsujimoto; X. Wang; C. I. Sathish; S. Yu; Y. Sun; W. Yi; K. Yamaura; E. Takayama-Muromachi; Y. Shirako; M. Akaogi; L. E. De Long

doi:10.1016/j.physc.2013.09.005

Quasi-periodic magnetic flux jumps in the superconducting state of Ba _0.5K_0.5Fe_1.9M_0.1As₂ (M = Fe, Co, Ni, Cu, and Zn)

J. Li, Y. Guo, S. Zhang, Y. Tsujimoto, X. Wang, C. I. Sathish, S. Yu, Y. Sun, W. Yi, K. Yamaura, E. Takayama-Muromachi, Y. Shirako, M. Akaogi, L. E. De Long

Physics And Astronomy

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

3 Scopus citations

Abstract

Polycrystals of Ba_0.5K_0.5Fe_1.9M _0.1As₂ (M = Fe, Co, Ni, Cu, and Zn) synthesized at high pressures show quasi-periodic spikes in the magnetization loop at 2 K owing to successive flux jumps, while the single crystals are observed as absence of jumps. The Zn-doped crystal indicates higher frequency flux jumps than that of Zn-free samples, because of the reduction of grain size and enhancement of grain boundary effect. However, the Co-, Ni- and Cu-doped crystals show less jumps duo to the increased granularity. Our present results suggest that the flux jump in the textured polycrystals is controlled largely by the grain boundary as the flux pining effect rather than the intrinsic dopants.

Original language	English
Pages (from-to)	192-197
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	495
DOIs	https://doi.org/10.1016/j.physc.2013.09.005
State	Published - 2013

Bibliographical note

Funding Information:
We thank Drs. M. Miyakawa, D. Johrendt, H.B. Wang, H. Kumakura, H.H. Wen, H. Kontani and J. Yuan for valuable discussions. This research was supported in part by the World Premier International Research Center from MEXT, Grants-in-Aid for Scientific Research (22246083) from JSPS, and the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program) from JSPS.

Funding

We thank Drs. M. Miyakawa, D. Johrendt, H.B. Wang, H. Kumakura, H.H. Wen, H. Kontani and J. Yuan for valuable discussions. This research was supported in part by the World Premier International Research Center from MEXT, Grants-in-Aid for Scientific Research (22246083) from JSPS, and the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program) from JSPS.

Funders	Funder number
Funding Program for World-Leading Innovative R&D on Science and Technology
Japan Society for the Promotion of Science	25287145
Ministry of Education, Culture, Sports, Science and Technology	22246083

Keywords

Doping
Fe-pnicitide
Flux jumps
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.2013.09.005

Cite this

Li, J., Guo, Y., Zhang, S., Tsujimoto, Y., Wang, X., Sathish, C. I., Yu, S., Sun, Y., Yi, W., Yamaura, K., Takayama-Muromachi, E., Shirako, Y., Akaogi, M., & De Long, L. E. (2013). Quasi-periodic magnetic flux jumps in the superconducting state of Ba _0.5K_0.5Fe_1.9M_0.1As₂ (M = Fe, Co, Ni, Cu, and Zn). Physica C: Superconductivity and its Applications, 495, 192-197. https://doi.org/10.1016/j.physc.2013.09.005

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title = "Quasi-periodic magnetic flux jumps in the superconducting state of Ba 0.5K0.5Fe1.9M0.1As2 (M = Fe, Co, Ni, Cu, and Zn)",

abstract = "Polycrystals of Ba0.5K0.5Fe1.9M 0.1As2 (M = Fe, Co, Ni, Cu, and Zn) synthesized at high pressures show quasi-periodic spikes in the magnetization loop at 2 K owing to successive flux jumps, while the single crystals are observed as absence of jumps. The Zn-doped crystal indicates higher frequency flux jumps than that of Zn-free samples, because of the reduction of grain size and enhancement of grain boundary effect. However, the Co-, Ni- and Cu-doped crystals show less jumps duo to the increased granularity. Our present results suggest that the flux jump in the textured polycrystals is controlled largely by the grain boundary as the flux pining effect rather than the intrinsic dopants.",

keywords = "Doping, Fe-pnicitide, Flux jumps, Superconductor",

author = "J. Li and Y. Guo and S. Zhang and Y. Tsujimoto and X. Wang and Sathish, {C. I.} and S. Yu and Y. Sun and W. Yi and K. Yamaura and E. Takayama-Muromachi and Y. Shirako and M. Akaogi and {De Long}, {L. E.}",

note = "Funding Information: We thank Drs. M. Miyakawa, D. Johrendt, H.B. Wang, H. Kumakura, H.H. Wen, H. Kontani and J. Yuan for valuable discussions. This research was supported in part by the World Premier International Research Center from MEXT, Grants-in-Aid for Scientific Research (22246083) from JSPS, and the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program) from JSPS.",

year = "2013",

doi = "10.1016/j.physc.2013.09.005",

language = "English",

volume = "495",

pages = "192--197",

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Li, J, Guo, Y, Zhang, S, Tsujimoto, Y, Wang, X, Sathish, CI, Yu, S, Sun, Y, Yi, W, Yamaura, K, Takayama-Muromachi, E, Shirako, Y, Akaogi, M & De Long, LE 2013, 'Quasi-periodic magnetic flux jumps in the superconducting state of Ba _0.5K_0.5Fe_1.9M_0.1As₂ (M = Fe, Co, Ni, Cu, and Zn)', Physica C: Superconductivity and its Applications, vol. 495, pp. 192-197. https://doi.org/10.1016/j.physc.2013.09.005

TY - JOUR

T1 - Quasi-periodic magnetic flux jumps in the superconducting state of Ba 0.5K0.5Fe1.9M0.1As2 (M = Fe, Co, Ni, Cu, and Zn)

AU - Li, J.

AU - Guo, Y.

AU - Zhang, S.

AU - Tsujimoto, Y.

AU - Wang, X.

AU - Sathish, C. I.

AU - Yu, S.

AU - Sun, Y.

AU - Yi, W.

AU - Yamaura, K.

AU - Takayama-Muromachi, E.

AU - Shirako, Y.

AU - Akaogi, M.

AU - De Long, L. E.

N1 - Funding Information: We thank Drs. M. Miyakawa, D. Johrendt, H.B. Wang, H. Kumakura, H.H. Wen, H. Kontani and J. Yuan for valuable discussions. This research was supported in part by the World Premier International Research Center from MEXT, Grants-in-Aid for Scientific Research (22246083) from JSPS, and the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program) from JSPS.

PY - 2013

Y1 - 2013

N2 - Polycrystals of Ba0.5K0.5Fe1.9M 0.1As2 (M = Fe, Co, Ni, Cu, and Zn) synthesized at high pressures show quasi-periodic spikes in the magnetization loop at 2 K owing to successive flux jumps, while the single crystals are observed as absence of jumps. The Zn-doped crystal indicates higher frequency flux jumps than that of Zn-free samples, because of the reduction of grain size and enhancement of grain boundary effect. However, the Co-, Ni- and Cu-doped crystals show less jumps duo to the increased granularity. Our present results suggest that the flux jump in the textured polycrystals is controlled largely by the grain boundary as the flux pining effect rather than the intrinsic dopants.

AB - Polycrystals of Ba0.5K0.5Fe1.9M 0.1As2 (M = Fe, Co, Ni, Cu, and Zn) synthesized at high pressures show quasi-periodic spikes in the magnetization loop at 2 K owing to successive flux jumps, while the single crystals are observed as absence of jumps. The Zn-doped crystal indicates higher frequency flux jumps than that of Zn-free samples, because of the reduction of grain size and enhancement of grain boundary effect. However, the Co-, Ni- and Cu-doped crystals show less jumps duo to the increased granularity. Our present results suggest that the flux jump in the textured polycrystals is controlled largely by the grain boundary as the flux pining effect rather than the intrinsic dopants.

KW - Doping

KW - Fe-pnicitide

KW - Flux jumps

KW - Superconductor

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