Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe1-xCoxSe0.5Te0.5 single crystals

Lina Sang; Babar Shabbir; Pankaj Maheshwari; Wenbin Qiu; Zongqing Ma; Shixue Dou; Chuanbing Cai; V. P.S. Awana; Xiaolin Wang

doi:10.1088/1361-6668/aa9efa

Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe_1-xCo_xSe_0.5Te_0.5 single crystals

Lina Sang, Babar Shabbir, Pankaj Maheshwari, Wenbin Qiu, Zongqing Ma, Shixue Dou, Chuanbing Cai, V. P.S. Awana, Xiaolin Wang

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

9 Citations (Scopus)

Abstract

We performed a systematic study of the hydrostatic pressure (HP) effect on the supercon-ducting transition temperature (T_c), critical current density (J_c), irreversibility field (H_irr), upper critical field (H_c2), and flux pinning mechanism in un-doped and 3 at.% Co-doped FeSe_0.5Te_0.5 crystals. We found that T_c is increased from 11.5 to 17 K as HP increases from 0 to 1.2 GPa. Remarkably, the J_c is significantly enhanced by a factor of 3 to 100 for low and high temperature and field, and the H_irr line is shifted to higher fields by HP up to 1.2 GPa. Based on the collective pinning model, the δl pinning associated with charge-carrier mean free path fluctuation is responsible for the pinning mechanism of Fe_1-xCo_xSe_0.5Te_0.5 samples with or without pressure. A comprehensive vortex phase diagram in the mixed state is constructed and analysed for the 3 at.% Co-doped sample.

Original language	English
Article number	025009
Number of pages	9
Journal	Superconductor Science and Technology
Volume	31
Issue number	2
DOIs	https://doi.org/10.1088/1361-6668/aa9efa
Publication status	Published - Feb 2018
Externally published	Yes

Keywords

critical current density
Fe-based superconductor
flux pinning
irreversible field
upper critical field

Access to Document

10.1088/1361-6668/aa9efa

Cite this

@article{f1aa0567ad6e41c4b028a7783d93c1a7,

title = "Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe1-xCoxSe0.5Te0.5 single crystals",

abstract = "We performed a systematic study of the hydrostatic pressure (HP) effect on the supercon-ducting transition temperature (Tc), critical current density (Jc), irreversibility field (Hirr), upper critical field (Hc2), and flux pinning mechanism in un-doped and 3 at.% Co-doped FeSe0.5Te0.5 crystals. We found that Tc is increased from 11.5 to 17 K as HP increases from 0 to 1.2 GPa. Remarkably, the Jc is significantly enhanced by a factor of 3 to 100 for low and high temperature and field, and the Hirr line is shifted to higher fields by HP up to 1.2 GPa. Based on the collective pinning model, the δl pinning associated with charge-carrier mean free path fluctuation is responsible for the pinning mechanism of Fe1-xCoxSe0.5Te0.5 samples with or without pressure. A comprehensive vortex phase diagram in the mixed state is constructed and analysed for the 3 at.% Co-doped sample.",

keywords = "critical current density, Fe-based superconductor, flux pinning, irreversible field, upper critical field",

author = "Lina Sang and Babar Shabbir and Pankaj Maheshwari and Wenbin Qiu and Zongqing Ma and Shixue Dou and Chuanbing Cai and Awana, {V. P.S.} and Xiaolin Wang",

year = "2018",

month = feb,

doi = "10.1088/1361-6668/aa9efa",

language = "English",

volume = "31",

journal = "Superconductor Science & Technology",

issn = "0953-2048",

publisher = "IOP Publishing",

number = "2",

}

TY - JOUR

T1 - Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe1-xCoxSe0.5Te0.5 single crystals

AU - Sang, Lina

AU - Shabbir, Babar

AU - Maheshwari, Pankaj

AU - Qiu, Wenbin

AU - Ma, Zongqing

AU - Dou, Shixue

AU - Cai, Chuanbing

AU - Awana, V. P.S.

AU - Wang, Xiaolin

PY - 2018/2

Y1 - 2018/2

N2 - We performed a systematic study of the hydrostatic pressure (HP) effect on the supercon-ducting transition temperature (Tc), critical current density (Jc), irreversibility field (Hirr), upper critical field (Hc2), and flux pinning mechanism in un-doped and 3 at.% Co-doped FeSe0.5Te0.5 crystals. We found that Tc is increased from 11.5 to 17 K as HP increases from 0 to 1.2 GPa. Remarkably, the Jc is significantly enhanced by a factor of 3 to 100 for low and high temperature and field, and the Hirr line is shifted to higher fields by HP up to 1.2 GPa. Based on the collective pinning model, the δl pinning associated with charge-carrier mean free path fluctuation is responsible for the pinning mechanism of Fe1-xCoxSe0.5Te0.5 samples with or without pressure. A comprehensive vortex phase diagram in the mixed state is constructed and analysed for the 3 at.% Co-doped sample.

AB - We performed a systematic study of the hydrostatic pressure (HP) effect on the supercon-ducting transition temperature (Tc), critical current density (Jc), irreversibility field (Hirr), upper critical field (Hc2), and flux pinning mechanism in un-doped and 3 at.% Co-doped FeSe0.5Te0.5 crystals. We found that Tc is increased from 11.5 to 17 K as HP increases from 0 to 1.2 GPa. Remarkably, the Jc is significantly enhanced by a factor of 3 to 100 for low and high temperature and field, and the Hirr line is shifted to higher fields by HP up to 1.2 GPa. Based on the collective pinning model, the δl pinning associated with charge-carrier mean free path fluctuation is responsible for the pinning mechanism of Fe1-xCoxSe0.5Te0.5 samples with or without pressure. A comprehensive vortex phase diagram in the mixed state is constructed and analysed for the 3 at.% Co-doped sample.

KW - critical current density

KW - Fe-based superconductor

KW - flux pinning

KW - irreversible field

KW - upper critical field

UR - http://www.scopus.com/inward/record.url?scp=85040679707&partnerID=8YFLogxK

U2 - 10.1088/1361-6668/aa9efa

DO - 10.1088/1361-6668/aa9efa

M3 - Article

AN - SCOPUS:85040679707

VL - 31

JO - Superconductor Science & Technology

JF - Superconductor Science & Technology

SN - 0953-2048

IS - 2

M1 - 025009

ER -

Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe_1-xCo_xSe_0.5Te_0.5 single crystals

Abstract

Keywords

Access to Document

Other files and links

ARC Centre of Excellence in Future Low-energy Electronics Technologies

Cite this

Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe1-xCoxSe0.5Te0.5 single crystals

Abstract

Keywords

Access to Document

Other files and links

Projects

ARC Centre of Excellence in Future Low-energy Electronics Technologies

Cite this

Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe_1-xCo_xSe_0.5Te_0.5 single crystals