Coexistence of Competing Antiferromagnetic and Superconducting Phases in the Underdoped Ba(Fe0.953Co0.047)2As2 Compound Using X-ray and Neutron Scattering Techniques

D. K. Pratt, W. Tian, A. Kreyssig, J. L. Zarestky, S. Nandi, N. Ni, S. L. Bud’ko, P. C. Canfield, A. I. Goldman, and R. J. McQueeney
Phys. Rev. Lett. 103, 087001 – Published 19 August 2009

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)2As2, a tetragonal-orthorhombic transition occurs at TS=60K, followed by a second-order transition to AFM order at TN=47K. Superconductivity occurs in the orthorhombic state below TC=17K and coexists with AFM. Below TC, the static Fe moment is reduced along with a redistribution of low energy magnetic excitations indicating competition between coexisting superconductivity and AFM order.

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  • Received 16 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.087001

©2009 American Physical Society

Authors & Affiliations

D. K. Pratt, W. Tian, A. Kreyssig, J. L. Zarestky, S. Nandi, N. Ni, S. L. Bud’ko, P. C. Canfield, A. I. Goldman, and R. J. McQueeney

  • Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011 USA

See Also

Static and Dynamic Magnetism in Underdoped Superconductor BaFe1.92Co0.08As2

A. D. Christianson, M. D. Lumsden, S. E. Nagler, G. J. MacDougall, M. A. McGuire, A. S. Sefat, R. Jin, B. C. Sales, and D. Mandrus
Phys. Rev. Lett. 103, 087002 (2009)

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Vol. 103, Iss. 8 — 21 August 2009

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