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Title: Detailed magnetic and structural analysis mapping a robust magnetic C 4 dome in Sr 1 - x Na x Fe 2 As 2

Abstract

The recently discovered C 4 tetragonal magnetic phase in hole-doped members of the iron-based superconductors provides new insights into the origin of unconventional superconductivity. Previously observed in Ba 1-xNa xFe 2As 2 (with A = K, Na), the C 4 magnetic phase exists within the well studied C 2 spin-density wave (SDW) dome, arising just before the complete suppression of antiferromagnetic (AFM) order but after the onset of superconductivity. Here in this paper, we present detailed x-ray and neutron diffraction studies of Sr 1-xNa xFe 2As 2 (0.10 ≤ x ≤ 0.60) to determine their structural evolution and the extent of the C 4 phase. Spanning Δx ~ 0.14 in composition, the C 4 phase is found to extend over a larger range of compositions, and to exhibit a significantly higher transition temperature, T r ~ 65K, than in either of the other systems in which it has been observed. The onset of this phase is seen near a composition (x~0:30) where the bonding angles of the Fe 2As 2 layers approach the perfect 109.46° tetrahedral angle. We discuss the possible role of this return to a higher symmetry environment for the magnetic iron site in triggering the magnetic reorientationmore » and the coupled re-entrance to the tetragonal structure. Finally, we present a new phase diagram, complete with the C 4 phase, and use its observation in a third hole-doped 122 system to suggest the universality of this phase.« less

Authors:
 [1];  [2];  [3];  [4];  [1];  [1];  [3];  [3];  [5];  [3];  [3];  [1]
  1. Northern Illinois Univ., DeKalb, IL (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Chemistry
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1352600
Alternate Identifier(s):
OSTI ID: 1248253
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 13; 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

Taddei, K. M., Allred, J. M., Bugaris, D. E., Lapidus, S., Krogstad, M. J., Stadel, R., Claus, H., Chung, D. Y., Kanatzidis, M. G., Rosenkranz, S., Osborn, R., and Chmaissem, O. Detailed magnetic and structural analysis mapping a robust magnetic C4 dome in Sr1-xNaxFe2As2. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.134510.
Taddei, K. M., Allred, J. M., Bugaris, D. E., Lapidus, S., Krogstad, M. J., Stadel, R., Claus, H., Chung, D. Y., Kanatzidis, M. G., Rosenkranz, S., Osborn, R., & Chmaissem, O. Detailed magnetic and structural analysis mapping a robust magnetic C4 dome in Sr1-xNaxFe2As2. United States. https://doi.org/10.1103/PhysRevB.93.134510
Taddei, K. M., Allred, J. M., Bugaris, D. E., Lapidus, S., Krogstad, M. J., Stadel, R., Claus, H., Chung, D. Y., Kanatzidis, M. G., Rosenkranz, S., Osborn, R., and Chmaissem, O. Wed . "Detailed magnetic and structural analysis mapping a robust magnetic C4 dome in Sr1-xNaxFe2As2". United States. https://doi.org/10.1103/PhysRevB.93.134510. https://www.osti.gov/servlets/purl/1352600.
@article{osti_1352600,
title = {Detailed magnetic and structural analysis mapping a robust magnetic C4 dome in Sr1-xNaxFe2As2},
author = {Taddei, K. M. and Allred, J. M. and Bugaris, D. E. and Lapidus, S. and Krogstad, M. J. and Stadel, R. and Claus, H. and Chung, D. Y. and Kanatzidis, M. G. and Rosenkranz, S. and Osborn, R. and Chmaissem, O.},
abstractNote = {The recently discovered C4 tetragonal magnetic phase in hole-doped members of the iron-based superconductors provides new insights into the origin of unconventional superconductivity. Previously observed in Ba1-xNaxFe2As2 (with A = K, Na), the C4 magnetic phase exists within the well studied C2 spin-density wave (SDW) dome, arising just before the complete suppression of antiferromagnetic (AFM) order but after the onset of superconductivity. Here in this paper, we present detailed x-ray and neutron diffraction studies of Sr1-xNaxFe2As2 (0.10 ≤ x ≤ 0.60) to determine their structural evolution and the extent of the C4 phase. Spanning Δx ~ 0.14 in composition, the C4 phase is found to extend over a larger range of compositions, and to exhibit a significantly higher transition temperature, Tr ~ 65K, than in either of the other systems in which it has been observed. The onset of this phase is seen near a composition (x~0:30) where the bonding angles of the Fe2As2 layers approach the perfect 109.46° tetrahedral angle. We discuss the possible role of this return to a higher symmetry environment for the magnetic iron site in triggering the magnetic reorientation and the coupled re-entrance to the tetragonal structure. Finally, we present a new phase diagram, complete with the C4 phase, and use its observation in a third hole-doped 122 system to suggest the universality of this phase.},
doi = {10.1103/PhysRevB.93.134510},
url = {https://www.osti.gov/biblio/1352600}, journal = {Physical Review B},
issn = {2469-9950},
number = 13,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}

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Cited by: 9 works
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Works referenced in this record:

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journal, November 2012


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journal, October 2008


Different resistivity response to spin-density wave and superconductivity at 20 K in Ca 1− x Na x Fe 2 As 2
journal, September 2008


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    Works referencing / citing this record:

    Preferred Magnetic Excitations in the Iron-Based Sr 1 x Na x Fe 2 As 2 Superconductor
    journal, January 2019


    Strong spin resonance mode associated with suppression of soft magnetic ordering in hole-doped Ba1-xNaxFe2As2
    journal, December 2019


    Single-crystal growth of the iron-based superconductor La 0.34 Na 0.66 Fe 2 As 2
    journal, October 2018


    Intertwined spin-orbital coupled orders in the iron-based superconductors
    journal, July 2019


    Distinct pressure evolution of coupled nematic and magnetic orders in FeSe
    journal, August 2019


    Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between C 2 and C 4 magnetic phases
    journal, July 2018


    Widespread orthorhombic fluctuations in the ( Sr , Na ) Fe 2 As 2 family of superconductors
    journal, November 2018


    Emergent Magnetic Degeneracy in Iron Pnictides due to the Interplay between Spin-Orbit Coupling and Quantum Fluctuations
    journal, July 2018