Atomic coexistence of superconductivity and incommensurate magnetic order in the pnictide Ba (Fe1-xCox)2As2

Y. Laplace; J. Bobroff; F. Rullier-Albenque; D. Colson; A. Forget

doi:10.1103/PhysRevB.80.140501

Atomic coexistence of superconductivity and incommensurate magnetic order in the pnictide Ba (Fe_1-xCo_x)₂As₂

Y. Laplace
, J. Bobroff
, F. Rullier-Albenque
, D. Colson
, A. Forget

Laboratoire de Physique des Solides
Université Paris-Saclay

Research output: Contribution to journal › Article › peer-review

145 Citations (Scopus)

Abstract

A 75 s nuclear magnetic resonance (NMR) and susceptiblity were measured in a Ba ((Fe_1-xCo_x)₂As₂ single crystal for x=6%. NMR spectra and relaxation rates allow to show that all Fe sites experience an incommensurate magnetic ordering below T=31 K. Comparison with undoped compound allows to estimate a typical moment of 0.05_μB. Anisotropy of the NMR widths can be interpreted using a model of incommensurability with a wave vector (1/2-ε,0,l) with ε of the order of 0.04. Below T_C =21.8 K, a full volume superconductivity develops as shown by susceptibility and relaxation rate, and magnetic order remains unaffected, demonstrating coexistence of both states on each Fe site.

Original language	English
Article number	140501
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.80.140501
Publication status	Published - 5 Oct 2009
Externally published	Yes

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abstract = "A 75 s nuclear magnetic resonance (NMR) and susceptiblity were measured in a Ba ((Fe1-xCox)2As2 single crystal for x=6\%. NMR spectra and relaxation rates allow to show that all Fe sites experience an incommensurate magnetic ordering below T=31 K. Comparison with undoped compound allows to estimate a typical moment of 0.05μB. Anisotropy of the NMR widths can be interpreted using a model of incommensurability with a wave vector (1/2-ε,0,l) with ε of the order of 0.04. Below TC =21.8 K, a full volume superconductivity develops as shown by susceptibility and relaxation rate, and magnetic order remains unaffected, demonstrating coexistence of both states on each Fe site.",

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AU - Laplace, Y.

AU - Bobroff, J.

AU - Rullier-Albenque, F.

AU - Colson, D.

AU - Forget, A.

PY - 2009/10/5

Y1 - 2009/10/5

N2 - A 75 s nuclear magnetic resonance (NMR) and susceptiblity were measured in a Ba ((Fe1-xCox)2As2 single crystal for x=6%. NMR spectra and relaxation rates allow to show that all Fe sites experience an incommensurate magnetic ordering below T=31 K. Comparison with undoped compound allows to estimate a typical moment of 0.05μB. Anisotropy of the NMR widths can be interpreted using a model of incommensurability with a wave vector (1/2-ε,0,l) with ε of the order of 0.04. Below TC =21.8 K, a full volume superconductivity develops as shown by susceptibility and relaxation rate, and magnetic order remains unaffected, demonstrating coexistence of both states on each Fe site.

AB - A 75 s nuclear magnetic resonance (NMR) and susceptiblity were measured in a Ba ((Fe1-xCox)2As2 single crystal for x=6%. NMR spectra and relaxation rates allow to show that all Fe sites experience an incommensurate magnetic ordering below T=31 K. Comparison with undoped compound allows to estimate a typical moment of 0.05μB. Anisotropy of the NMR widths can be interpreted using a model of incommensurability with a wave vector (1/2-ε,0,l) with ε of the order of 0.04. Below TC =21.8 K, a full volume superconductivity develops as shown by susceptibility and relaxation rate, and magnetic order remains unaffected, demonstrating coexistence of both states on each Fe site.

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DO - 10.1103/PhysRevB.80.140501

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JO - Physical Review B - Condensed Matter and Materials Physics

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Atomic coexistence of superconductivity and incommensurate magnetic order in the pnictide Ba (Fe1-xCox)2As2

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Atomic coexistence of superconductivity and incommensurate magnetic order in the pnictide Ba (Fe_1-xCo_x)₂As₂