Skip to main content
Open Access Publications from the University of California

UC Berkeley

UC Berkeley Previously Published Works bannerUC Berkeley

Strong ferromagnetic exchange interaction under ambient pressure in BaFe2 S3

  • Author(s): Wang, M
  • Jin, SJ
  • Yi, M
  • Song, Y
  • Jiang, HC
  • Zhang, WL
  • Sun, HL
  • Luo, HQ
  • Christianson, AD
  • Bourret-Courchesne, E
  • Lee, DH
  • Yao, DX
  • Birgeneau, RJ
  • et al.

Inelastic neutron scattering measurements have been performed to investigate the spin waves of the quasi-one-dimensional antiferromagnetic ladder compound BaFe2S3, where a superconducting transition was observed under pressure [H. Takahashi, Nat. Mater. 14, 1008 (2015)1476-112210.1038/nmat4351; T. Yamauchi, Phys. Rev. Lett. 115, 246402 (2015)PRLTAO0031-900710.1103/PhysRevLett.115.246402]. By fitting the spherically averaged experimental data collected on a powder sample to a Heisenberg Hamiltonian, we find that the one-dimensional antiferromagnetic ladder exhibits a strong nearest-neighbor ferromagnetic exchange interaction (SJR=-71±4 meV) along the rung direction, an antiferromagnetic SJL=49±3 meV along the leg direction, and a ferromagnetic SJ2=-15±2 meV along the diagonal direction. Our data demonstrate that the antiferromagnetic spin excitations are a common characteristic for the iron-based superconductors, while specific relative values for the exchange interactions do not appear to be unique for the parent states of the superconducting materials.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View