Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
7-1-2012
Journal or Book Title
Physical Review B
Volume
86
Issue
2
First Page
020503(R)
DOI
10.1103/PhysRevB.86.020503
Abstract
Inelastic neutron scattering measurements on Ba(Fe0.925Mn0.075)(2)As-2 manifest spin fluctuations at two different wave vectors, Q(stripe) = (1/2,1/2,1) and Q(Neel) = (1,0,1), corresponding to the expected stripe spin-density wave order and checkerboard antiferromagnetic order in the tetragonal I4/mmm cell, respectively. Below T-N = 80 K, long-range stripe magnetic ordering occurs and sharp spin wave excitations appear at Q(stripe) while broad and diffusive spin fluctuations remain at Q(Neel) at all temperatures. Low concentrations of Mn dopants nucleate local moment spin fluctuations at Q(Neel) that compete with itinerant spin fluctuations at Q(stripe) and may disrupt the development of superconductivity.
Copyright Owner
American Physical Society
Copyright Date
2012
Language
en
File Format
application/pdf
Recommended Citation
Tucker, G. S.; Pratt, D. K.; Kim, M. G.; Ran, S.; Thaler, A.; Granroth, G. E.; Marty, K.; Tian, W.; Zarestky, J. L.; Lumsden, M. D.; Bud’ko, Sergey L.; Canfield, Paul C.; Kreyssig, Andreas; Goldman, Alan I.; and McQueeney, Robert, "Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe2As2" (2012). Physics and Astronomy Publications. 639.
https://lib.dr.iastate.edu/physastro_pubs/639
Comments
This article is published as Tucker, Gregory S., Daniel K. Pratt, Min Gyu Kim, Sheng Ran, Alexander Thaler, G. E. Granroth, K. Marty et al. "Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe 2 As 2." Physical Review B 86, no. 2 (2012): 020503. DOI: 10.1103/PhysRevB.86.020503. Posted with permission.