%0 Journal Article
%T Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe2As2
%A G. S. Tucker
%A D. K. Pratt
%A M. G. Kim
%A S. Ran
%A A. Thaler
%A G. E. Granroth
%A K. Marty
%A W. Tian
%A J. L. Zarestky
%A M. D. Lumsden
%A S. L. Bud'ko
%A P. C. Canfield
%A A. Kreyssig
%A A. I. Goldman
%A R. J. McQueeney
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevB.86.020503
%X Inelastic neutron scattering measurements on Ba(Fe0.925Mn0.075)2As2 manifest spin fluctuations at two different wavevectors in the Fe square lattice, (1/2,0) and (1/2,1/2), corresponding to the expected stripe spin-density wave order and checkerboard antiferromagnetic order, respectively. Below T_N=80 K, long-range stripe magnetic ordering occurs and sharp spin wave excitations appear at (1/2,0) while broad and diffusive spin fluctuations remain at (1/2,1/2) at all temperatures. Low concentrations of Mn dopants nucleate local moment spin fluctuations at (1/2,1/2) that compete with itinerant spin fluctuations at (1/2,0) and may disrupt the development of superconductivity.
%U http://arxiv.org/abs/1206.3486v1