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

Title: NMR Study of the New Magnetic Superconductor CaK(Fe0:951Ni0:049)4As4: Microscopic Coexistence of Hedgehog Spin-vortex Crystal and Superconductivity

Journal Article · · Physical Review B

Coexistence of a new-type antiferromagnetic (AFM) state, the so-called hedgehog spin-vortex crystal (SVC), and superconductivity (SC) is evidenced by 75As nuclear magnetic resonance study on single-crystalline CaK(Fe0:951Ni0:049)4As4. The hedgehog SVC order is clearly demonstrated by the direct observation of the internal magnetic induction along the c axis at the As1 site (close to K) and a zero net internal magnetic induction at the As2 site (close to Ca) below an AFM ordering temperature TN ~ 52 K. The nuclear spin-lattice relaxation rate 1/T1 shows a distinct decrease below Tc ~ 10 K, providing also unambiguous evidence for the microscopic coexistence. Furthermore, based on the analysis of the 1/T1 data, the hedgehog SVC-type spin correlations are found to be enhanced below T ~ 150 K in the paramagnetic state. Furthermore, these results indicate the hedgehog SVC-type spin correlations play an important role for the appearance of SC in the new magnetic superconductor.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1415856
Alternate ID(s):
OSTI ID: 1416432
Report Number(s):
IS-J-9543
Journal Information:
Physical Review B, Vol. 96, Issue 22; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

References (47)

Nodeless multiband superconductivity in stoichiometric single-crystalline CaKFe 4 As 4 journal March 2017
Tetragonal magnetic phase in Ba 1 x K x Fe 2 As 2 from x-ray and neutron diffraction journal September 2015
Anisotropic thermodynamic and transport properties of single-crystalline CaKFe 4 As 4 journal August 2016
Suppression of electron correlations in the collapsed tetragonal phase of Ca Fe 2 As 2 under ambient pressure demonstrated by As 75 NMR/NQR measurements journal March 2014
Crystallographic, electronic, thermal, and magnetic properties of single-crystal SrCo 2 As 2 journal July 2013
Expansion of the tetragonal magnetic phase with pressure in the iron arsenide superconductor Ba 1 x K x Fe 2 As 2 journal April 2016
Superconductivity-induced re-entrance of the orthorhombic distortion in Ba1−xKxFe2As2 journal July 2015
Double-Q spin-density wave in iron arsenide superconductors journal January 2016
Pressure-induced Fermi-surface reconstruction in the iron-arsenide superconductor Ba 1 x K x Fe 2 As 2 : Evidence of a phase transition inside the antiferromagnetic phase journal October 2012
Volovik effect and Fermi-liquid behavior in the s -wave superconductor CaPd 2 As 2 :   As 75 NMR-NQR measurements journal April 2016
Magnetically driven suppression of nematic order in an iron-based superconductor journal May 2014
New-Structure-Type Fe-Based Superconductors: Ca A Fe 4 As 4 ( A = K, Rb, Cs) and Sr A Fe 4 As 4 ( A = Rb, Cs) journal March 2016
Signature of multigap nodeless superconductivity in CaKFe 4 As 4 journal April 2017
Coexistence of Competing Antiferromagnetic and Superconducting Phases in the Underdoped Ba ( Fe 0.953 Co 0.047 ) 2 As 2 Compound Using X-ray and Neutron Scattering Techniques journal August 2009
Antiferromagnetism of SrFe 2 As 2 Studied by Single-Crystal 75 As-NMR journal June 2009
FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe 2 As 2 journal August 2010
Complex phase diagram of Ba 1 x Na x Fe 2 As 2 : A multitude of phases striving for the electronic entropy journal January 2016
Potential Antiferromagnetic Fluctuations in Hole-Doped Iron-Pnictide Superconductor Ba 1- x K x Fe 2 As 2 Studied by 75 As Nuclear Magnetic Resonance Measurement journal May 2012
Microscopic coexistence of antiferromagnetic order and superconductivity in Ba 0.77 K 0.23 Fe 2 As 2 journal November 2012
Stripe antiferromagnetic correlations in LaFeAsO 1 x F x probed by A 75 s NMR journal June 2010
Atomic coexistence of superconductivity and incommensurate magnetic order in the pnictide Ba ( Fe 1 x Co x ) 2 As 2 journal October 2009
Magnetic fluctuations and superconducting properties of CaKFe 4 As 4 studied by As 75 NMR journal September 2017
Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors journal January 2016
Antiferromagnetic spin correlations and pseudogaplike behavior in Ca ( Fe 1 x Co x ) 2 As 2 studied by As 75 nuclear magnetic resonance and anisotropic resistivity journal November 2015
Disorder-promoted C 4 -symmetric magnetic order in iron-based superconductors journal April 2016
Optimization of the crystal growth of the superconductor CaKFe 4 As 4 from solution in the FeAs CaFe 2 As 2 KFe 2 As 2 system journal June 2017
Superconductivity in iron compounds journal December 2011
Microscopic Evidence of Direct Coupling between Magnetic and Superconducting Order Parameters in BaFe 2 (As 1- x P x ) 2 journal March 2012
Microscopic Coexistence of Superconductivity and Magnetism in Ba 1 x K x Fe 2 As 2 journal November 2011
Electronic properties, low-energy Hamiltonian, and superconducting instabilities in CaKFe 4 As 4 journal September 2017
Distinct High- T Transitions in Underdoped Ba 1 x K x Fe 2 As 2 journal August 2010
Stabilizing the spin vortex crystal phase in two-dimensional iron-based superconductors journal February 2017
Magnetoelastic coupling in the phase diagram of Ba 1 x K x Fe 2 As 2 as seen via neutron diffraction journal May 2011
Enhancement of the Superconducting Gap by Nesting in CaKFe 4 As 4 : A New High Temperature Superconductor journal December 2016
Antiferromagnetic ordering in the absence of structural distortion in Ba ( Fe 1 x Mn x ) 2 As 2 journal December 2010
Microscopic Coexistence of Superconductivity and Antiferromagnetism in Underdoped Ba ( Fe 1 x Ru x ) 2 As 2 journal November 2012
Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe 4 As 4 journal September 2017
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal October 2010
FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2 text January 2010
Superconductivity in Iron Compounds text January 2011
Microscopic Evidence of Direct Coupling between Magnetic and Superconducting Order Parameters in BaFe$_2$(As$_{1-x}$P$_x$)$_2$ text January 2011
Microscopic coexistence of antiferromagnetic order and superconductivity in Ba$_{0.77}$K$_{0.23}$Fe$_{2}$As$_{2}$ text January 2012
Magnetically-Driven Suppression of Nematic Order in an Iron-Based Superconductor text January 2013
Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors text January 2015
Double-Q spin-density wave in iron arsenide superconductors text January 2015
Complex phase diagram of Ba$_{1-x}$Na$_{x}$Fe$_{2}$As$_{2}$: a multitude of phases striving for the electronic entropy text January 2015
Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe4As4 text January 2017

Cited By (3)

Effect of pressure on the self-hole-doped superconductor RbGd 2 Fe 4 As 4 O 2 journal December 2018
Odd and Even Modes of Neutron Spin Resonance in the Bilayer Iron-Based Superconductor CaKFe 4 As 4 journal June 2018
Preferred Magnetic Excitations in the Iron-Based Sr 1 x Na x Fe 2 As 2 Superconductor journal January 2019

Figures / Tables (4)


Similar Records

75As NMR Studies of Magnetic Properties of the Magnetic Superconductor CaK(Fe0.967Ni0.033)4As4
Journal Article · Mon Apr 01 00:00:00 EDT 2019 · Solid State Phenomena (Online) · OSTI ID:1415856

Antiferromagnetic order and its interplay with superconductivity in CaK(Fe$_{1-x}$Mn$_x$)4As4
Journal Article · Thu Jun 29 00:00:00 EDT 2023 · Journal of Physics. Condensed Matter · OSTI ID:1415856

Hedgehog Spin-Vortex Crystal Antiferromagnetic Quantum Criticality in CaK(Fe1-xNix)4As4 Revealed by NMR
Journal Article · Wed Sep 26 00:00:00 EDT 2018 · Physical Review Letters · OSTI ID:1415856