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

Title: 75As NMR Studies of Magnetic Properties of the Magnetic Superconductor CaK(Fe0.967Ni0.033)4As4

Journal Article · · Solid State Phenomena (Online)
ORCiD logo [1];  [1];  [2];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Karlsruhe Institute of Technology, Karlsruhe (Germany)

We have carried out 75As nuclear magnetic resonance (NMR) measurements to investigate a new antiferromagnetic (AFM) state, the so-called hedgehog spin-vortex crystal (SVC) in CaK(Fe0.967Ni0.033)4As4. Here, the hedgehog SVC order is clearly demonstrated by the direct observation of 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 of TN~ 45 K. In the superconducting (SC) state, the NMR signal intensity decreases suddenly just below Tc~ 20 K due to Meissner effect, evidencing the coexistence of the hedgehog SVC AFM and SC states from a microscopic point of view.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1560623
Report Number(s):
IS-J-10015; SSP; TRN: US2000522
Journal Information:
Solid State Phenomena (Online), Vol. 289; ISSN 1662-9779
Publisher:
Trans Tech PublicationsCopyright Statement
Country of Publication:
United States
Language:
English

References (26)

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
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
Magnetic fluctuations and superconducting properties of CaKFe 4 As 4 studied by As 75 NMR journal September 2017
Double-Q spin-density wave in iron arsenide superconductors journal January 2016
Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors journal January 2016
Disorder-promoted C 4 -symmetric magnetic order in iron-based superconductors journal April 2016
Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor journal February 2018
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
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
Stabilizing the spin vortex crystal phase in two-dimensional iron-based superconductors journal February 2017
Enhancement of the Superconducting Gap by Nesting in CaKFe 4 As 4 : A New High Temperature Superconductor journal December 2016
Principles of Magnetic Resonance book January 1990
Antiferromagnetic ordering in the absence of structural distortion in Ba ( Fe 1 x Mn x ) 2 As 2 journal December 2010
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal October 2010
Principles of Magnetic Resonance journal January 1991
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
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
Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor text January 2017
Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe4As4 text January 2017