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Competing magnetic ground states in nonsuperconducting Ba(Fe1-xCrx)(2)As-2 as seen via neutron diffraction

TitleCompeting magnetic ground states in nonsuperconducting Ba(Fe1-xCrx)(2)As-2 as seen via neutron diffraction
Publication TypeJournal Article
Year of Publication2011
AuthorsMarty K, Christianson AD, Wang CH, Matsuda M, Cao H, VanBebber LH, Zarestky JL, Singh DJ, Sefat AS, Lumsden MD
Journal TitlePhysical Review B
Volume83
Pages060509
Date Published02
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000287712600002
Abstract

We present neutron diffraction measurements on single-crystal samples of nonsuperconducting Ba(Fe1-xCrx)(2)As-2 as a function of Cr doping for 0 <= x <= 0.47. The average spin-density-wave moment is independent of concentration for x <= 0.2 and decreases rapidly for x >= 0.3. For concentrations in excess of 30% chromium, we find a new competing magnetic phase consistent with G-type antiferromagnetism which rapidly becomes the dominant magnetic ground state. Strong magnetism is observed for all concentrations measured, naturally explaining the absence of superconductivity in the Cr-doped materials.
URL<Go to ISI>://000287712600002
DOI10.1103/PhysRevB.83.060509
Alternate JournalPhys. Rev. B