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Article
75As NMR Studies of Magnetic Properties of the Magnetic Superconductor CaK(Fe0.967Ni0.033)4As4
Ames Laboratory Accepted Manuscripts
  • Qing-Ping Ding, Iowa State University and Ames Laboratory
  • William R. Meier, Iowa State University and Ames Laboratory
  • Anna E. Böhmer, Iowa State University and Ames Laboratory
  • Sergey L. Bud’ko, Iowa State University and Ames Laboratory
  • Paul C. Canfield, Iowa State University and Ames Laboratory
  • Yuji Furukawa, Iowa State University and Ames Laboratory
Publication Date
4-1-2019
Department
Ames Laboratory; Physics and Astronomy
OSTI ID+
1560623
Report Number
10015
DOI
10.4028/www.scientific.net/SSP.289.148
Journal Title
Solid State Phenomena
Abstract

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. 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 approximately 45 K. In the superconducting (SC) state, the NMR signal intensity decreases suddenly just below Tc approximately 20 K due to Meissner effect, evidencing the coexistence of the hedgehog SVC AFM and SC states from a microscopic point of view.

DOE Contract Number(s)
AC02-07CH11358
Language
en
Publisher
Iowa State University Digital Repository, Ames IA (United States)
Disciplines
Citation Information
Qing-Ping Ding, William R. Meier, Anna E. Böhmer, Sergey L. Bud’ko, et al.. "75As NMR Studies of Magnetic Properties of the Magnetic Superconductor CaK(Fe0.967Ni0.033)4As4" Vol. 289 (2019) p. 148 - 155
Available at: http://works.bepress.com/paul_canfield/208/