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Coexistence of Competing Antiferromagnetic and Superconducting Phases in the Underdoped Ba(Fe0.953Co0.047)(2)As-2 Compound Using X-ray and Neutron Scattering Techniques

TitleCoexistence of Competing Antiferromagnetic and Superconducting Phases in the Underdoped Ba(Fe0.953Co0.047)(2)As-2 Compound Using X-ray and Neutron Scattering Techniques
Publication TypeJournal Article
Year of Publication2009
AuthorsPratt DK, Tian W, Kreyssig A, Zarestky JL, Nandi S, Ni N, Bud'ko SL, Canfield PC, Goldman AI, McQueeney RJ
Journal TitlePhysical Review Letters
Volume103
Pages087001
Date Published08/21
ISBN Number0031-9007
Accession NumberISI:000269288500054
Keywordsmagnetic order, spin-density-wave, upt3
Abstract

Neutron and x-ray diffraction studies show that the simultaneous first-order transition to an orthorhombic and antiferromagnetic (AFM) ordered state in BaFe2As2 splits into two transitions with Co doping. For Ba(Fe0.953Co0.047)(2)As-2, a tetragonal-orthorhombic transition occurs at T-S=60 K, followed by a second-order transition to AFM order at T-N=47 K. Superconductivity occurs in the orthorhombic state below T-C=17 K and coexists with AFM. Below T-C, the static Fe moment is reduced along with a redistribution of low energy magnetic excitations indicating competition between coexisting superconductivity and AFM order.
URL<Go to ISI>://000269288500054
DOI10.1103/Physrevlett.103.087001