Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe2As2

Abstract

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.

5 pages, 5 figures

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Cited by in corpus (17)

• Suppression of superconductivity by Neel-type magnetic fluctuations in the iron pnictides
• Enhancing magnetic stripe order in iron pnictides by RKKY exchange interactions
• Raman scattering as a probe of nematic correlations
• Intertwined spin-orbital coupled orders in the iron-based superconductors
• Possible unconventional superconductivity in substituted BaFe${}_2$As${}_2$ revealed by magnetic pair-breaking studies
• Anisotropic magnetic excitations and incipient Néel order in Ba(Fe${}_{1-x}$Mn${}_x$)${}_2$As${}_2$
• Carrier localization due to local magnetic order induced by magnetic impurities in Ba(Fe${}_{1-x}$TM${}_x$)${}_2$As${}_2$ (TM = Mn and Cr) as seen via optical spectra
• Competing superconducting and magnetic order parameters and field-induced magnetism in electron doped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Orbital-selective coherence-incoherence crossover and metal-insulator transition in Cu-doped NaFeAs
• Role of magnetic dopants in the phase diagram of Sm1111 pnictides: The Mn case
• Incoherent electronic band states in Mn-substituted BaFe${}_2$As${}_2$
• Emergence of the minority hole with high mobility on the electrical transport in the Fe-pnictides Ba(Fe${}_{1-x}$Mn${}_x$As)${}_2$
• Hole doping and electronic correlations in Cr-substituted BaFe${}_2$As${}_2$
• Antiferromagnetic order and its interplay with superconductivity in CaK(Fe${}_{1-x}$Mn${}_x$)${}_4$As${}_4$
• Quasi-one-dimensional spin excitations in the iron pnictide NaFe${}_{0.53}$Cu${}_{0.47}$As
• Strong local moment antiferromagnetic spin fluctuations in V-doped LiFeAs
• Crystal growth and characterization of a hole-doped iron-based superconductor Ba(Fe${}_{0.875}$Ti${}_{0.125}$)${}_2$As${}_2$