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Title: Magnetism and its coexistence with superconductivity in CaK(Fe 0.949Ni 0.051) 4As 4: Muon spin rotation/relaxation studies

Abstract

Here, the magnetic response of Ca K ( Fe 0.949 Ni 0.051 ) 4 As 4 was investigated by means of the muon spin rotation/relaxation. The long-range commensurate magnetic order sets in below the Néel temperature T N = 50.0 ( 5 ) K. The density-functional theory calculations have identified three possible muon stopping sites. The experimental data were found to be consistent with only one type of magnetic structure, namely, the long-range magnetic spin-vortex-crystal order with the hedgehog motif within the a b plane and the antiferromagnetic stacking along the c direction. The value of the ordered magnetic moment at T 3 K was estimated to be m Fe = 0.38 ( 11 ) μ B ( μ B is the Bohr magneton). A microscopic coexistence of magnetic and superconducting phases accompanied by a reduction of the magnetic order parameter below the superconducting transition temperature T c 9 K is observed. Comparison with 11, 122, and 1144 families of Fe-based pnictides points to existence of correlation between the reduction of the magnetic order parameter at T 0 and the ratio of the transition temperatures T c / T N . Such correlations were found to be described by Machida's model for coexistence of itinerant spin-density-wave magnetism and superconductivity [K. Machida, J. Phys. Soc. Jpn. 50, 2195 (1981); S. L. Bud'ko et al., Phys. Rev. B 98, 144520 (2018)].

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [3];  [4];  [4];  [4];  [5]; ORCiD logo [4]
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland); Univ. Paris-Sud, Orsay (France); Univ. Paris-Saclay, Orsay (France)
  3. National Academy of Sciences of Ukraine (NASU), Kharkov (Ukraine)
  4. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  5. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Sponsoring Org.:
Swiss National Science Foundation (SNF); Gordon and Betty Moore Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
OSTI Identifier:
1660599
Report Number(s):
IS-J-10,305
Journal ID: ISSN 2469-9950
Grant/Contract Number:  
200021-175935; P2EZP2-178604; GBMF4411; AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 102; Journal Issue: 9; 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; 36 MATERIALS SCIENCE

Citation Formats

Khasanov, Rustem, Simutis, Gediminas, Pashkevich, Yurii G., Shevtsova, Tatyana, Meier, William R., Xu, Mingyu, Bud'ko, Sergey L., Kogan, Vladimir G., and Canfield, Paul C. Magnetism and its coexistence with superconductivity in CaK(Fe0.949Ni0.051)4As4: Muon spin rotation/relaxation studies. United States: N. p., 2020. Web. doi:10.1103/physrevb.102.094504.
Khasanov, Rustem, Simutis, Gediminas, Pashkevich, Yurii G., Shevtsova, Tatyana, Meier, William R., Xu, Mingyu, Bud'ko, Sergey L., Kogan, Vladimir G., & Canfield, Paul C. Magnetism and its coexistence with superconductivity in CaK(Fe0.949Ni0.051)4As4: Muon spin rotation/relaxation studies. United States. doi:10.1103/physrevb.102.094504.
Khasanov, Rustem, Simutis, Gediminas, Pashkevich, Yurii G., Shevtsova, Tatyana, Meier, William R., Xu, Mingyu, Bud'ko, Sergey L., Kogan, Vladimir G., and Canfield, Paul C. Thu . "Magnetism and its coexistence with superconductivity in CaK(Fe0.949Ni0.051)4As4: Muon spin rotation/relaxation studies". United States. doi:10.1103/physrevb.102.094504.
@article{osti_1660599,
title = {Magnetism and its coexistence with superconductivity in CaK(Fe0.949Ni0.051)4As4: Muon spin rotation/relaxation studies},
author = {Khasanov, Rustem and Simutis, Gediminas and Pashkevich, Yurii G. and Shevtsova, Tatyana and Meier, William R. and Xu, Mingyu and Bud'ko, Sergey L. and Kogan, Vladimir G. and Canfield, Paul C.},
abstractNote = {Here, the magnetic response of CaK(Fe0.949Ni0.051)4As4 was investigated by means of the muon spin rotation/relaxation. The long-range commensurate magnetic order sets in below the Néel temperature TN=50.0(5) K. The density-functional theory calculations have identified three possible muon stopping sites. The experimental data were found to be consistent with only one type of magnetic structure, namely, the long-range magnetic spin-vortex-crystal order with the hedgehog motif within the ab plane and the antiferromagnetic stacking along the c direction. The value of the ordered magnetic moment at T≈3 K was estimated to be mFe=0.38(11)μB (μB is the Bohr magneton). A microscopic coexistence of magnetic and superconducting phases accompanied by a reduction of the magnetic order parameter below the superconducting transition temperature Tc≃9 K is observed. Comparison with 11, 122, and 1144 families of Fe-based pnictides points to existence of correlation between the reduction of the magnetic order parameter at T→0 and the ratio of the transition temperatures Tc/TN. Such correlations were found to be described by Machida's model for coexistence of itinerant spin-density-wave magnetism and superconductivity [K. Machida, J. Phys. Soc. Jpn. 50, 2195 (1981); S. L. Bud'ko et al., Phys. Rev. B 98, 144520 (2018)].},
doi = {10.1103/physrevb.102.094504},
journal = {Physical Review B},
issn = {2469-9950},
number = 9,
volume = 102,
place = {United States},
year = {2020},
month = {9}
}

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