Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with Superconductivity in BaFe2-xNixAs2

Published

June 12, 2012

Author(s)

Huiqian Luo, Rui Zhang, Mark Laver, Zahra Yamani, Meng Wang, Xingye Lu, Miaoyin Wang, Yanchao Chen, Shiliang Li, Sung Chang, Jeffrey W. Lynn, Pengcheng Dai

Abstract

Superconductivity in the iron pnictide develops near antiferromagnetism, and the antiferromagnetic (Af) phase appears to overlap with the superconducting phase in some materials such as BaFe_2-x(Co,NI)_xAs₂. Here we use neutron scattering to demonstrate that genuine long-range AF order and superconductivity do not coexsist in BaFe_2-xNi_xAs₂ near optimal superconductivity. In addition, we find no evidence for a magnetic quantum critical poing between the A and superconducting phases. Instead, the data reveal the incommensurate short-range AF order coexists and competes with superconductivity, where the AF spin correlation length is comparable to the superconducting shoerence length.

Citation

Physical Review Letters

Volume

108

Issue

24

Pub Type

Journals

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Keywords

Iron superconductor, Neutron Scattering, Magnetic Order, Spin Excitations, doping dependence, Commensurate antiferromagnetism, Incommensurate antiferromagnetism

Citation

Luo, H. , Zhang, R. , Laver, M. , Yamani, Z. , Wang, M. , Lu, X. , Wang, M. , Chen, Y. , Li, S. , Chang, S. , Lynn, J. and Dai, P. (2012), Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with Superconductivity in BaFe_2-xNi_xAs₂, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910435 (Accessed May 8, 2025)