Magnetism in superconducting EuFe2As1.4P 0.6 single crystals studied by local probes

J. Munevar; H. Micklitz; M. Alzamora; C. Argüello; T. Goko; F. L. Ning; T. Munsie; T. J. Williams; A. A. Aczel; G. M. Luke; G. F. Chen; W. Yu; Y. J. Uemura; E. Baggio-Saitovitch

doi:10.1016/j.ssc.2014.02.001

Magnetism in superconducting EuFe₂As_1.4P _0.6 single crystals studied by local probes

J. Munevar, H. Micklitz, M. Alzamora, C. Argüello, T. Goko, F. L. Ning, T. Munsie, T. J. Williams, A. A. Aczel, G. M. Luke, G. F. Chen, W. Yu, Y. J. Uemura, E. Baggio-Saitovitch

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11 Scopus citations

Abstract

We have studied the magnetism in superconducting single crystals of EuFe₂As_1.4P_0.6 by using the local probe techniques of zero-field muon spin rotation/relaxation and ¹⁵¹Eu/ ⁵⁷Fe Mössbauer spectroscopy. All of these measurements reveal magnetic hyperfine fields below the magnetic ordering temperature ^TM=18K of the Eu²⁺ moments. The analysis of the data shows that there is a coexistence of antiferromagnetism, resulting from Eu ²⁺ moments ordered along the crystallographic c-axis, and superconductivity below ^TSC≈ 10 K. We find indications for a change in the dynamics of the small Fe magnetic moments (∼0.07 ^μB) at T^*≲15K that may be triggering the onset of superconductivity: below T^* the Fe magnetic moments seem to be "frozen" within the ab-plane.

Original language	English
Pages (from-to)	18-22
Number of pages	5
Journal	Solid State Communications
Volume	187
DOIs	https://doi.org/10.1016/j.ssc.2014.02.001
State	Published - Jun 2014

Funding

This work has been supported by the US NSF under the Materials World Network (MWN: DMR-0502706 and 0806846 ) and the Partnership for International Research and education (PIRE: OISE-0968226 ) programs at Columbia, by Canadian NSERC and CIFAR at McMaster , and by CIAM (CNPq-NSF) , CNPq and FAPERJ at CBPF in Rio de Janeiro, Brazil and NSFC and MOST of China: 973 project 2011CB605900 at IOP in Beijing. H. Micklitz acknowledge visitor fellowships of CAPES and CNPq to work at CBPF.

Keywords

A. Iron pnictides
C. Mössbauer spectroscopy
C. μSR
D. Superconductivity

Access to Document

10.1016/j.ssc.2014.02.001

Cite this

Munevar, J., Micklitz, H., Alzamora, M., Argüello, C., Goko, T., Ning, F. L., Munsie, T., Williams, T. J., Aczel, A. A., Luke, G. M., Chen, G. F., Yu, W., Uemura, Y. J., & Baggio-Saitovitch, E. (2014). Magnetism in superconducting EuFe₂As_1.4P _0.6 single crystals studied by local probes. Solid State Communications, 187, 18-22. https://doi.org/10.1016/j.ssc.2014.02.001

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abstract = "We have studied the magnetism in superconducting single crystals of EuFe2As1.4P0.6 by using the local probe techniques of zero-field muon spin rotation/relaxation and 151Eu/ 57Fe M{\"o}ssbauer spectroscopy. All of these measurements reveal magnetic hyperfine fields below the magnetic ordering temperature TM=18K of the Eu2+ moments. The analysis of the data shows that there is a coexistence of antiferromagnetism, resulting from Eu 2+ moments ordered along the crystallographic c-axis, and superconductivity below TSC≈ 10 K. We find indications for a change in the dynamics of the small Fe magnetic moments (∼0.07 μB) at T*≲15K that may be triggering the onset of superconductivity: below T* the Fe magnetic moments seem to be {"}frozen{"} within the ab-plane.",

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author = "J. Munevar and H. Micklitz and M. Alzamora and C. Arg{\"u}ello and T. Goko and Ning, {F. L.} and T. Munsie and Williams, {T. J.} and Aczel, {A. A.} and Luke, {G. M.} and Chen, {G. F.} and W. Yu and Uemura, {Y. J.} and E. Baggio-Saitovitch",

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AU - Micklitz, H.

AU - Alzamora, M.

AU - Argüello, C.

AU - Goko, T.

AU - Ning, F. L.

AU - Munsie, T.

AU - Williams, T. J.

AU - Aczel, A. A.

AU - Luke, G. M.

AU - Chen, G. F.

AU - Yu, W.

AU - Uemura, Y. J.

AU - Baggio-Saitovitch, E.

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AB - We have studied the magnetism in superconducting single crystals of EuFe2As1.4P0.6 by using the local probe techniques of zero-field muon spin rotation/relaxation and 151Eu/ 57Fe Mössbauer spectroscopy. All of these measurements reveal magnetic hyperfine fields below the magnetic ordering temperature TM=18K of the Eu2+ moments. The analysis of the data shows that there is a coexistence of antiferromagnetism, resulting from Eu 2+ moments ordered along the crystallographic c-axis, and superconductivity below TSC≈ 10 K. We find indications for a change in the dynamics of the small Fe magnetic moments (∼0.07 μB) at T*≲15K that may be triggering the onset of superconductivity: below T* the Fe magnetic moments seem to be "frozen" within the ab-plane.

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