Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe2As2
Journal Article
·
· Physical Review B
Inelastic neutron scattering measurements on Ba(Fe0.925Mn0.075)2As2 manifest spin fluctuations at two different wave vectors, Qstripe=(1/2,1/2,1) and QNéel=(1,0,1), corresponding to the expected stripe spin-density wave order and checkerboard antiferromagnetic order in the tetragonal I4/mmm cell, respectively. Below TN=80 K, long-range stripe magnetic ordering occurs and sharp spin wave excitations appear at Qstripe while broad and diffusive spin fluctuations remain at QNéel at all temperatures. Low concentrations of Mn dopants nucleate local moment spin fluctuations at QNéel that compete with itinerant spin fluctuations at Qstripe and may disrupt the development of superconductivity.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1052090
- Report Number(s):
- IS-J 7765
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 86; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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