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Title: Lack of superconductivity in the phase diagram of single-crystalline Eu ( F e 1 - x C o x ) 2 A s 2 grown by transition metal arsenide flux

Abstract

Here, the interplay of magnetism and superconductivity (SC) has been a focus of interest in condensed matter physics for decades. EuFe 2As 2 has been identified as a potential platform to investigate interactions between structural, magnetic, and electronic effects as well as the coexistence of magnetism and SC with similar transition temperatures. However, there are obvious inconsistencies in the reported phase diagrams of Eu(Fe 1–xCo x) 2As 2 crystals grown by different methods. For transition metal arsenide (TMA)-flux-grown crystals, even the existence of SC is uncertain. Here we reexamine the phase diagram of single-crystalline Eu(Fe 1–xCo x) 2As 2 grown by TMA flux. We found that the lattice parameter c shrinks linearly with Co doping, almost twice as fast as that of the tin-flux-grown crystals. With Co doping, the spin-density-wave (SDW) order of the Fe sublattice is quickly suppressed, being detected only up to x=0.08. The magnetic ordering temperature of the Eu 2+ sublattice ( T Eu) shows a systematic evolution with Co doping, first going down and reaching a minimum at x=0.08, then increasing continuously up to x=0.24. Over the whole composition range investigated, no signature of SC is observed above 1.8 K.

Authors:
 [1];  [2];  [3];  [2];  [2];  [2]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. 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:
1478231
Alternate Identifier(s):
OSTI ID: 1475233
Report Number(s):
IS-J-9779
Journal ID: ISSN 2475-9953; PRMHAR
Grant/Contract Number:  
AC02-07CH11358; 51832010; 51572291; 51322211; GBMF4411
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 2; Journal Issue: 10; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Wang, Gang, Meier, William R., Straszheim, Warren E., Slagle, Joshua, Bud’ko, Sergey L., and Canfield, Paul C. Lack of superconductivity in the phase diagram of single-crystalline Eu(Fe1-xCox)2As2 grown by transition metal arsenide flux. United States: N. p., 2018. Web. doi:10.1103/PhysRevMaterials.2.104801.
Wang, Gang, Meier, William R., Straszheim, Warren E., Slagle, Joshua, Bud’ko, Sergey L., & Canfield, Paul C. Lack of superconductivity in the phase diagram of single-crystalline Eu(Fe1-xCox)2As2 grown by transition metal arsenide flux. United States. doi:10.1103/PhysRevMaterials.2.104801.
Wang, Gang, Meier, William R., Straszheim, Warren E., Slagle, Joshua, Bud’ko, Sergey L., and Canfield, Paul C. Tue . "Lack of superconductivity in the phase diagram of single-crystalline Eu(Fe1-xCox)2As2 grown by transition metal arsenide flux". United States. doi:10.1103/PhysRevMaterials.2.104801. https://www.osti.gov/servlets/purl/1478231.
@article{osti_1478231,
title = {Lack of superconductivity in the phase diagram of single-crystalline Eu(Fe1-xCox)2As2 grown by transition metal arsenide flux},
author = {Wang, Gang and Meier, William R. and Straszheim, Warren E. and Slagle, Joshua and Bud’ko, Sergey L. and Canfield, Paul C.},
abstractNote = {Here, the interplay of magnetism and superconductivity (SC) has been a focus of interest in condensed matter physics for decades. EuFe2As2 has been identified as a potential platform to investigate interactions between structural, magnetic, and electronic effects as well as the coexistence of magnetism and SC with similar transition temperatures. However, there are obvious inconsistencies in the reported phase diagrams of Eu(Fe1–xCox)2As2 crystals grown by different methods. For transition metal arsenide (TMA)-flux-grown crystals, even the existence of SC is uncertain. Here we reexamine the phase diagram of single-crystalline Eu(Fe1–xCox)2As2 grown by TMA flux. We found that the lattice parameter c shrinks linearly with Co doping, almost twice as fast as that of the tin-flux-grown crystals. With Co doping, the spin-density-wave (SDW) order of the Fe sublattice is quickly suppressed, being detected only up to x=0.08. The magnetic ordering temperature of the Eu2+ sublattice (TEu) shows a systematic evolution with Co doping, first going down and reaching a minimum at x=0.08, then increasing continuously up to x=0.24. Over the whole composition range investigated, no signature of SC is observed above 1.8 K.},
doi = {10.1103/PhysRevMaterials.2.104801},
journal = {Physical Review Materials},
number = 10,
volume = 2,
place = {United States},
year = {2018},
month = {10}
}

Works referenced in this record:

Superconductivity and local-moment magnetism in Eu ( Fe 0.89 Co 0.11 ) 2 As 2
journal, November 2009


Phase diagram of pressure-induced superconductivity in EuFe 2 As 2 probed by high-pressure resistivity up to 3.2 GPa
journal, June 2011


57 Fe and 151 Eu Mössbauer spectroscopy and magnetization studies of Eu(Fe 0.89 Co 0.11 ) 2 As 2 and Eu(Fe 0.9 Ni 0.1 ) 2 As 2
journal, February 2011


Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples
journal, December 2015


Pressure-induced changes in the magnetic and valence state of EuFe 2 As 2
journal, July 2011


Magnetic structure of superconducting Eu(Fe 0.82 Co 0.18 ) 2 As 2 as revealed by single-crystal neutron diffraction
journal, December 2013


Phase diagram of Eu magnetic ordering in Sn-flux-grown Eu ( Fe 1 x Co x ) 2 As 2 single crystals
journal, November 2016


Strong coupling between Eu 2 + spins and Fe 2 As 2 layers in EuFe 1 . 9 Co 0 . 1 As 2 observed with NMR
journal, April 2011


Manifesto for a higher Tc
journal, April 2011

  • Basov, D. N.; Chubukov, Andrey V.
  • Nature Physics, Vol. 7, Issue 4
  • DOI: 10.1038/nphys1975

Europium-based iron pnictides: a unique laboratory for magnetism, superconductivity and structural effects
journal, November 2016


Interplay of antiferromagnetism, ferromagnetism, and superconductivity in EuFe 2 (As 1 x P x ) 2 single crystals
journal, February 2011


Superconductivity Induced by Phosphorus Doping and Its Coexistence with Ferromagnetism in EuFe 2 ( As 0.7 P 0.3 ) 2
journal, April 2009


Reentrant superconductivity in Eu(Fe 1− x Ir x ) 2 As 2
journal, June 2013


Magnetic properties of ternary lanthanoid transition metal arsenides studied by Mössbauer and susceptibility measurements
journal, February 1993


New Magnetic Superconductors: A Toy Box for Solid‐State Physicists
journal, October 1998

  • Canfield, Paul C.; Gammel, Peter L.; Bishop, David J.
  • Physics Today, Vol. 51, Issue 10
  • DOI: 10.1063/1.882396

Superconductivity at 34.7 K in the iron arsenide Eu 0.7 Na 0.3 Fe 2 As 2
journal, December 2008


High-temperature superconductivity in Eu 0.5 K 0.5 Fe 2 As 2
journal, September 2008


Evolution of the multiband Ruderman–Kittel–Kasuya–Yosida interaction: application to iron pnictides and chalcogenides
journal, March 2013


Interplay between magnetism and superconductivity in EuFe 2 x Co x As 2 studied by 57 Fe and 151 Eu M o ̈ ssbauer spectroscopy
journal, November 2011


Electron spin resonance in EuFe 2 x Co x As 2 single crystals
journal, February 2010


Anomalous critical fields and the absence of Meissner state in Eu(Fe 0.88 Ir 0.12 ) 2 As 2 crystals
journal, November 2013


X-Ray diffraction on large single crystals using a powder diffractometer
journal, June 2016


Anisotropic superconductivity in Eu(Fe 0.75 Ru 0.25 ) 2 As 2 ferromagnetic superconductor
journal, September 2011


The Challenge of Unconventional Superconductivity
journal, April 2011


Antiferromagnetic transition in EuFe 2 As 2 : A possible parent compound for superconductors
journal, August 2008


Control of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe 1 x Co x ) 2 As 2
journal, June 2012


Electrical resistivity and specific heat of single-crystalline EuFe 2 As 2 : A magnetic homologue of SrFe 2 As 2
journal, August 2008


Magnetic structure of EuFe 2 As 2 determined by single-crystal neutron diffraction
journal, November 2009


Tuning superconductivity in Eu(Fe 0.81 Co 0.19 ) 2 As 2 with magnetic fields
journal, February 2012


Interplay between superconductivity and magnetism
journal, October 1995


Cobalt-doping effects in single crystalline and polycrystalline EuFe2−x Co x As2 compounds
journal, May 2010

  • Chen, XiaoBo; Ren, ZhiAn; Ding, HongSheng
  • Science China Physics, Mechanics and Astronomy, Vol. 53, Issue 7
  • DOI: 10.1007/s11433-010-4005-2

Evolution of superconductivity and ferromagnetism in Eu(Fe 1− x Ru x ) 2 As 2
journal, December 2012


Doping dependence of the Nernst effect in Eu(Fe 1 x Co x ) 2 As 2 : Departure from Dirac-fermion physics
journal, June 2011


EuFe 2 ( As 1 x P x ) 2 : Reentrant Spin Glass and Superconductivity
journal, June 2013