A neutron scattering study of the interplay between structure and magnetism in Ba(Fe$_{1-x}$Co$_{x}$)$_2$As$_2$

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dc.creatorLester, C.
dc.creatorChu, Jiun-Haw
dc.creatorAnalytis, J. G.
dc.creatorCapelli, S.
dc.creatorErickson, A. S.
dc.creatorCondron, C. L.
dc.creatorToney, M. F.
dc.creatorFisher, I. R.
dc.creatorHayden, S. M.
dc.date2009-03-20
dc.date.accessioned2026-07-07T13:07:48Z
dc.date.available2026-07-07T13:07:48Z
dc.descriptionSingle crystal neutron diffraction is used to investigate the magnetic and structural phase diagram of the electron doped superconductor Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$. Heat capacity and resistivity measurements have demonstrated that Co doping this system splits the combined antiferromagnetic and structural transition present in BaFe$_2$As$_2$ into two distinct transitions. For $x$=0.025, we find that the upper transition is between the high-temperature tetragonal and low-temperature orthorhombic structures with ($T_{\mathrm{TO}}=99 \pm 0.5$ K) and the antiferromagnetic transition occurs at $T_{\mathrm{AF}}=93 \pm 0.5$ K. We find that doping rapidly suppresses the antiferromagnetism, with antiferromagnetic order disappearing at $x \approx 0.055$. However, there is a region of co-existence of antiferromagnetism and superconductivity. The effect of the antiferromagnetic transition can be seen in the temperature dependence of the structural Bragg peaks from both neutron scattering and x-ray diffraction. We infer from this that there is strong coupling between the antiferromagnetism and the crystal lattice.
dc.identifierhttps://arxiv.org/abs/0903.3560
dc.identifierhttp://arxiv.org/abs/0903.3560
dc.identifierPhys. Rev. B 79, 144523 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.144523
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228210
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleA neutron scattering study of the interplay between structure and magnetism in Ba(Fe$_{1-x}$Co$_{x}$)$_2$As$_2$
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