skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

Here, the pressure dependence of the magnetic and superconducting transitions and that of the superconducting upper critical field are reported for CaK(Fe 1–xNi x) 4As 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 N are suppressed upon applying pressure; the superconducting transition temperatures T c are suppressed by pressure as well, except for x = 0.050 in the pressure region where T N and T c cross. Furthermore, the pressure associated with the crossing of the T N and T 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. Lastly, at p ~ 4 GPa, both Ni-substituted CaK(Fe 1–xNi x) 4As 4 samples likely go through a half-collapsed-tetragonal phase transition, similar to the parent compound CaKFe 4As 4.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1441000
Alternate Identifier(s):
OSTI ID: 1438274
Report Number(s):
IS-J-9681
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
AC02-07CH11358; GBMF4411
Resource Type:
Journal Article: 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

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. doi: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. doi: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. doi:10.1103/PhysRevB.97.174517.
@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 = {Here, the pressure dependence of the magnetic and superconducting transitions and that of the superconducting upper critical field are reported for CaK(Fe1–xNix)4As4, 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 TN are suppressed upon applying pressure; the superconducting transition temperatures Tc are suppressed by pressure as well, except for x = 0.050 in the pressure region where TN and Tc cross. Furthermore, the pressure associated with the crossing of the TN and Tc 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. Lastly, at p ~ 4 GPa, both Ni-substituted CaK(Fe1–xNix)4As4 samples likely go through a half-collapsed-tetragonal phase transition, similar to the parent compound CaKFe4As4.},
doi = {10.1103/PhysRevB.97.174517},
journal = {Physical Review B},
number = 17,
volume = 97,
place = {United States},
year = {Tue May 22 00:00:00 EDT 2018},
month = {Tue May 22 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 22, 2019
Publisher's Version of Record

Save / Share: