skip to main content


This content will become publicly available on September 18, 2018

Title: NMR studies of the helical antiferromagnetic compound EuCo 2P 2

In EuCo 2P 2, 4 f electron spins of Eu 2+ ions order antiferromagnetically below a Neel temperature T N = 66.5K. The magnetic structure below T N was reported to be helical with the helix axis along the c-axis from the neutron diffraction study. We report the results of 153Eu, 59Co and 31P nuclear magnetic resonance (NMR) measurements on EuCo 2P 2 using a single crystal and a powdered sample. In the antiferromagnetic (AFM) state, we succeeded in observing 153Eu, 59Co and 31P NMR spectra in zero magnetic field. The sharp 153Eu zero field NMR (ZF NMR) lines indicate homogeneous Eu ordered moment. The 59Co and 31P ZF NMR spectra showed an asymmetric spectral shape, indicating a distribution of the internal magnetic induction at each nuclear position. The AFM propagation vector k characterizing the helical AFM state can be determined from the internal magnetic induction at Co site. In conclusion, we have determined the model-independent value of the AFM propagation vector k distributed from (0, 0, 0.86)2π/c to (0, 0, 0.73)2π/c, where c is the lattice parameter.
 [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [2] ;  [2] ;  [2] ;  [4] ;  [3] ;  [3] ;  [3]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States); Univ. of Ryukyus, Okinawa (Japan)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. Univ. of Ryukyus, Okinawa (Japan)
  4. Tokoku Univ., Ibaraki (Japan)
Publication Date:
Report Number(s):
Journal ID: ISSN 0921-4526; PII: S0921452617306506
Grant/Contract Number:
AC02-07CH11358; JP15K21732; JP15H05885; JP16H01078
Accepted Manuscript
Journal Name:
Physica. B, Condensed Matter
Additional Journal Information:
Journal Volume: 536; Journal Issue: C; Journal ID: ISSN 0921-4526
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; EuCo2P2; Helical antiferromagnet; Antiferromagnetic propagation vector; NMR
OSTI Identifier: