Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo2As2 revealed by 59Co and 75As NMR

Wiecki, P.; Ogloblichev, V.; Pandey, Abhishek; Johnston, D. C.; Furukawa, Y.

doi:10.1103/PhysRevB.91.220406

Title: Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo₂As₂ revealed by ⁵⁹Co and ⁷⁵As NMR

Abstract

In nonsuperconducting, metallic paramagnetic SrCo₂As₂, inelastic neutron scattering measurements have revealed strong stripe-type q=(π,0) antiferromagnetic (AFM) spin correlations. Using nuclear magnetic resonance (NMR) measurements on ⁵⁹Co and ⁷⁵As nuclei, we demonstrate that stronger ferromagnetic (FM) spin correlations coexist in SrCo₂As₂. Our NMR data are consistent with density functional theory (DFT) calculations which show enhancements at both q=(π,0) and the in-plane FM q=0 wave vectors in static magnetic susceptibility χ(q). We suggest that the strong FM fluctuations prevent superconductivity in SrCo₂As₂, despite the presence of stripe-type AFM fluctuations. Since DFT calculations have consistently revealed similar enhancements of the χ(q) at both q=(π,0) and q=0 in the iron-based superconductors and parent compounds, our observation of FM correlations in SrCo₂As₂ calls for detailed studies of FM correlations in the iron-based superconductors.

Authors:

Wiecki, P. ^[1]; Ogloblichev, V. ^[2]; Pandey, Abhishek ^[1]; Johnston, D. C. ^[1]; Furukawa, Y. ^[1]

Ames Lab. (AMES), Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Ames Lab. (AMES), Ames, IA (United States); Ural Division of Russian Academy of Sciences, Ekaterinburg (Russia)

Publication Date:: Mon Jun 15 00:00:00 EDT 2015

Research Org.:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1227376

Alternate Identifier(s):: OSTI ID: 1184687

Report Number(s):: IS-J-8697
Journal ID: ISSN 1098-0121; PRBMDO

Grant/Contract Number:: AC02-07CH11358; 15-02-02000

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 91; Journal Issue: 22; Journal ID: ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Wiecki, P., Ogloblichev, V., Pandey, Abhishek, Johnston, D. C., and Furukawa, Y. Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo2As2 revealed by 59Co and 75As NMR.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevB.91.220406.

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                    Wiecki, P., Ogloblichev, V., Pandey, Abhishek, Johnston, D. C., & Furukawa, Y. Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo2As2 revealed by 59Co and 75As NMR.  United States.  https://doi.org/10.1103/PhysRevB.91.220406

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                    Wiecki, P., Ogloblichev, V., Pandey, Abhishek, Johnston, D. C., and Furukawa, Y. Mon .  
"Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo2As2 revealed by 59Co and 75As NMR".  United States.  https://doi.org/10.1103/PhysRevB.91.220406.  https://www.osti.gov/servlets/purl/1227376.

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@article{osti_1227376,

  title        = {Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo2As2 revealed by 59Co and 75As NMR},

  author       = {Wiecki, P. and Ogloblichev, V. and Pandey, Abhishek and Johnston, D. C. and Furukawa, Y.},

  abstractNote = {In nonsuperconducting, metallic paramagnetic SrCo2As2, inelastic neutron scattering measurements have revealed strong stripe-type q=(π,0) antiferromagnetic (AFM) spin correlations. Using nuclear magnetic resonance (NMR) measurements on 59Co and 75As nuclei, we demonstrate that stronger ferromagnetic (FM) spin correlations coexist in SrCo2As2. Our NMR data are consistent with density functional theory (DFT) calculations which show enhancements at both q=(π,0) and the in-plane FM q=0 wave vectors in static magnetic susceptibility χ(q). We suggest that the strong FM fluctuations prevent superconductivity in SrCo2As2, despite the presence of stripe-type AFM fluctuations. Since DFT calculations have consistently revealed similar enhancements of the χ(q) at both q=(π,0) and q=0 in the iron-based superconductors and parent compounds, our observation of FM correlations in SrCo2As2 calls for detailed studies of FM correlations in the iron-based superconductors.},

  doi          = {10.1103/PhysRevB.91.220406},

  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  number       = 22,

  volume       = 91,

  place        = {United States},

  year         = {Mon Jun 15 00:00:00 EDT 2015},

  month        = {Mon Jun 15 00:00:00 EDT 2015}

}

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Title: Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo2As2 revealed by 59Co and 75As NMR

Abstract

Citation Formats

FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe 2 As 2 journal, August 2010

59Co NMR in Co2+ ion at tetrahedral site journal, April 1968

Competing orders and spin-density-wave instability in La(O 1−x F x )FeAs journal, June 2008

The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal, October 2010

First-order structural phase transition in CaFe 2 As 2 journal, July 2008

Superconductivity at 38 K in the Iron Arsenide ( Ba 1 − x K x ) Fe 2 As 2 journal, September 2008

Superconductivity at 22 K in Co-Doped BaFe 2 As 2 Crystals journal, September 2008

Superconductivity in iron compounds journal, December 2011

Effects of Co substitution on thermodynamic and transport properties and anisotropic H c 2 in Ba ( Fe 1 − x Co x ) 2 As 2 single crystals journal, December 2008

Superconducting State in SrFe 2 − x Co x As 2 by Internal Doping of the Iron Arsenide Layers journal, November 2008

Phase diagram of superconductivity and antiferromagnetism in single crystals of Sr(Fe 1 − x Co x ) 2 As 2 and Sr 1 − y Eu y (Fe 0 . 88 Co 0 . 12 ) 2 As 2 journal, March 2011

Magnetic and structural transitions in layered iron arsenide systems: A Fe 2 As 2 versus R FeAsO journal, September 2008

Low Energy Spin Waves and Magnetic Interactions in SrFe 2 As 2 journal, October 2008

Crystallographic, electronic, thermal, and magnetic properties of single-crystal SrCo 2 As 2 journal, July 2013

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Density Functional Study of LaFeAsO 1 − x F x : A Low Carrier Density Superconductor Near Itinerant Magnetism journal, June 2008

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C 59 o and A 75 s NMR investigation of lightly doped Ba ( Fe 1 − x Co x ) 2 As 2 ( x = 0.02 , 0.04 ) journal, April 2009

NMR Study of Antiferromagnetic Spinel C o C o 2 O 4 in Paramagnetic and Ordered State journal, December 1996

Experimental evidence of a collinear antiferromagnetic ordering in the frustrated CoAl 2 O 4 spinel journal, November 2013

The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals journal, April 1963

Effects of Electron-Electron Interactions on Nuclear Spin-Lattice Relaxation Rates and Knight Shifts in Alkali and Noble Metals journal, November 1968

Crystallography and physical properties of BaCo 2 As 2 , Ba 0.94 K 0.06 Co 2 As 2 , and Ba 0.78 K 0.22 Co 2 As 2 journal, August 2014

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Title: Coexistence of antiferromagnetic and ferromagnetic spin correlations in SrCo₂As₂ revealed by ⁵⁹Co and ⁷⁵As NMR

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The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
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Unconventional Superconductivity with a Sign Reversal in the Order Parameter of ${LaFeAsO}_{1 - x} F_{x}$
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Interplay between magnetic properties and Fermi surface nesting in iron pnictides
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Electron-hole asymmetry in the superconductivity of doped ${BaFe}_{2} {As}_{2}$ seen via the rigid chemical-potential shift in photoemission
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${}^{59}C o$ and ${}^{75}A s$ NMR investigation of lightly doped $Ba {({Fe}_{1 - x} {Co}_{x})}_{2} {As}_{2}$ $(x = 0.02, 0.04)$
journal, April 2009

NMR Study of Antiferromagnetic Spinel C o C o ₂ O ₄ in Paramagnetic and Ordered State
journal, December 1996

Experimental evidence of a collinear antiferromagnetic ordering in the frustrated CoAl $_{2}$ O $_{4}$ spinel
journal, November 2013

The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals
journal, April 1963

Effects of Electron-Electron Interactions on Nuclear Spin-Lattice Relaxation Rates and Knight Shifts in Alkali and Noble Metals
journal, November 1968

Crystallography and physical properties of ${BaCo}_{2} {As}_{2}, {Ba}_{0.94} K_{0.06} {Co}_{2} {As}_{2}$ , and ${Ba}_{0.78} K_{0.22} {Co}_{2} {As}_{2}$
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