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Title: Pressure-temperature phase diagrams of CaK ( Fe 1 x Ni x ) 4 As 4 superconductors

Abstract

In this paper, the pressure dependence of the magnetic and superconducting transitions and that of the superconducting upper critical field are reported for $$\mathrm{CaK}{({\mathrm{Fe}}_{1{-}x}{\mathrm{Ni}}_{x})}_{4}{\mathrm{As}}_{4}$$, the first example of an Fe-based superconductor with spin-vortex-crystal-type magnetic ordering. Resistance measurements were performed on single crystals with two substitution levels $(x=0.033,0.050)$ under hydrostatic pressures up to 5.12 GPa and in magnetic fields up to 9 T. Our results show that, for both compositions, magnetic transition temperatures $${T}_{\mathrm{N}}$$ are suppressed upon applying pressure; the superconducting transition temperatures $${T}_{\mathrm{c}}$$ are suppressed by pressure as well, except for $x=0.050$ in the pressure region where $${T}_{\mathrm{N}}$$ and $${T}_{\mathrm{c}}$$ cross. Furthermore, the pressure associated with the crossing of the $${T}_{\mathrm{N}}$$ and $${T}_{\mathrm{c}}$$ lines also coincides with a minimum in the normalized slope of the superconducting upper critical field, consistent with a likely Fermi-surface reconstruction associated with the loss of magnetic ordering. In conclusion, at $$p{\sim}4$$ GPa, both Ni-substituted $$\mathrm{CaK}{({\mathrm{Fe}}_{1{-}x}{\mathrm{Ni}}_{x})}_{4}{\mathrm{As}}_{4}$$ samples likely go through a half-collapsed-tetragonal phase transition, similar to the parent compound $${\mathrm{CaKFe}}_{4}{\mathrm{As}}_{4}$$.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States); Ames Lab. and Iowa State Univ., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); W. M. Keck Foundation (United States); Gordon and Betty Moore Foundation (United States)
OSTI Identifier:
1441000
Alternate Identifier(s):
OSTI ID: 1438258; OSTI ID: 1438274
Report Number(s):
IS-J-9681
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1900861
Grant/Contract Number:  
AC02-07CH11358; GBMF4411
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnetism; phase diagrams; pressure effects; superconductivity; 4-terminal techniques

Citation Formats

Xiang, Li, Meier, William R., Xu, Mingyu, Kaluarachchi, Udhara S., Bud'ko, Sergey L., and Canfield, Paul C.. Pressure-temperature phase diagrams of CaK(Fe1–xNix)4As4 superconductors. United States: N. p., 2018. Web. https://doi.org/10.1103/PhysRevB.97.174517.
Xiang, Li, Meier, William R., Xu, Mingyu, Kaluarachchi, Udhara S., Bud'ko, Sergey L., & Canfield, Paul C.. Pressure-temperature phase diagrams of CaK(Fe1–xNix)4As4 superconductors. United States. https://doi.org/10.1103/PhysRevB.97.174517
Xiang, Li, Meier, William R., Xu, Mingyu, Kaluarachchi, Udhara S., Bud'ko, Sergey L., and Canfield, Paul C.. Tue . "Pressure-temperature phase diagrams of CaK(Fe1–xNix)4As4 superconductors". United States. https://doi.org/10.1103/PhysRevB.97.174517. https://www.osti.gov/servlets/purl/1441000.
@article{osti_1441000,
title = {Pressure-temperature phase diagrams of CaK(Fe1–xNix)4As4 superconductors},
author = {Xiang, Li and Meier, William R. and Xu, Mingyu and Kaluarachchi, Udhara S. and Bud'ko, Sergey L. and Canfield, Paul C.},
abstractNote = {In this paper, the pressure dependence of the magnetic and superconducting transitions and that of the superconducting upper critical field are reported for $\mathrm{CaK}{({\mathrm{Fe}}_{1{-}x}{\mathrm{Ni}}_{x})}_{4}{\mathrm{As}}_{4}$, the first example of an Fe-based superconductor with spin-vortex-crystal-type magnetic ordering. Resistance measurements were performed on single crystals with two substitution levels $(x=0.033,0.050)$ under hydrostatic pressures up to 5.12 GPa and in magnetic fields up to 9 T. Our results show that, for both compositions, magnetic transition temperatures ${T}_{\mathrm{N}}$ are suppressed upon applying pressure; the superconducting transition temperatures ${T}_{\mathrm{c}}$ are suppressed by pressure as well, except for $x=0.050$ in the pressure region where ${T}_{\mathrm{N}}$ and ${T}_{\mathrm{c}}$ cross. Furthermore, the pressure associated with the crossing of the ${T}_{\mathrm{N}}$ and ${T}_{\mathrm{c}}$ lines also coincides with a minimum in the normalized slope of the superconducting upper critical field, consistent with a likely Fermi-surface reconstruction associated with the loss of magnetic ordering. In conclusion, at $p{\sim}4$ GPa, both Ni-substituted $\mathrm{CaK}{({\mathrm{Fe}}_{1{-}x}{\mathrm{Ni}}_{x})}_{4}{\mathrm{As}}_{4}$ samples likely go through a half-collapsed-tetragonal phase transition, similar to the parent compound ${\mathrm{CaKFe}}_{4}{\mathrm{As}}_{4}$.},
doi = {10.1103/PhysRevB.97.174517},
journal = {Physical Review B},
number = 17,
volume = 97,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:

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Cited by: 3 works
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Figures / Tables:

FIG. 1 FIG. 1: (a) Evolution of the in-plane resistance with hydrostatic pressures up to 1.83 GPa measured in a PCC for the CaK(Fe0:967Ni0.033)4As4, sample#1. (b) Blowup of the low temperature region. Criteria for T$onset\atop{c}$ and T$offset\atop{c}$ are indicated in the figure. (c) Temperature derivative, dR/dT, showing the evolution of the magneticmore » transition TN with offset criteria as shown in the figure.« less

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    Works referencing / citing this record:

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