Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba0.77K0.23Fe2As2 revealed by NMR

R. Zhou; Z. Li; J. Yang; G. Q. Zheng

doi:10.1007/s10751-013-0862-1

Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba_0.77K_0.23Fe₂As₂ revealed by NMR

R. Zhou, Z. Li, J. Yang, G. Q. Zheng

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

Abstract

We have performed nuclear magnetic resonance (NMR) measurements on an underdoped single-crystal Ba_{0. 77}K_{0. 23}Fe₂As₂ with T_c = 16. 5 K. Below T_N = 46 K, an internal magnetic field splits the NMR peaks of H ∥ c and shifts those of H ∥ a to higher frequencies. The nuclear spin-lattice relaxation rate 1/T₁ measured at the central peak with H ∥ a shows a distinct decrease below T_c(μ₀H = 12 T) = 16 K. Our results clearly show that antiferromagnetic order and superconductivity coexist at a microscopical length scale.

Original language	English
Pages (from-to)	95-102
Number of pages	8
Journal	Hyperfine Interactions
Volume	222
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-013-0862-1
Publication status	Published - May 2013

Keywords

Antiferromagnetism
Iron pnictides
Nuclear magnetic resonance
Superconductivity

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

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title = "Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba0.77K0.23Fe2As2 revealed by NMR",

abstract = "We have performed nuclear magnetic resonance (NMR) measurements on an underdoped single-crystal Ba0. 77K0. 23Fe2As2 with Tc = 16. 5 K. Below TN = 46 K, an internal magnetic field splits the NMR peaks of H ∥ c and shifts those of H ∥ a to higher frequencies. The nuclear spin-lattice relaxation rate 1/T1 measured at the central peak with H ∥ a shows a distinct decrease below Tc(μ0H = 12 T) = 16 K. Our results clearly show that antiferromagnetic order and superconductivity coexist at a microscopical length scale.",

keywords = "Antiferromagnetism, Iron pnictides, Nuclear magnetic resonance, Superconductivity",

author = "R. Zhou and Z. Li and J. Yang and Zheng, {G. Q.}",

note = "Funding Information: Acknowledgements This work was done in collaboration with C.T. Lin, Y. Liu and D.L. Sun of Max Planck Institute. This work was supported by NSFC grant No. 11104336, National Basic Research Program of China (973 Program), No. 2011CBA00109 and by CAS. Work at Okayama was supported by MEXT grant No. 22103004.",

year = "2013",

month = may,

doi = "10.1007/s10751-013-0862-1",

language = "English",

volume = "222",

pages = "95--102",

journal = "Hyperfine Interaction",

issn = "0304-3843",

publisher = "Springer Netherlands",

number = "1-3",

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TY - JOUR

T1 - Microscopic coexistence of antiferromagnetism and superconductivity in hole-doped Iron-pnictides Ba0.77K0.23Fe2As2 revealed by NMR

AU - Zhou, R.

AU - Li, Z.

AU - Yang, J.

AU - Zheng, G. Q.

N1 - Funding Information: Acknowledgements This work was done in collaboration with C.T. Lin, Y. Liu and D.L. Sun of Max Planck Institute. This work was supported by NSFC grant No. 11104336, National Basic Research Program of China (973 Program), No. 2011CBA00109 and by CAS. Work at Okayama was supported by MEXT grant No. 22103004.

PY - 2013/5

Y1 - 2013/5

N2 - We have performed nuclear magnetic resonance (NMR) measurements on an underdoped single-crystal Ba0. 77K0. 23Fe2As2 with Tc = 16. 5 K. Below TN = 46 K, an internal magnetic field splits the NMR peaks of H ∥ c and shifts those of H ∥ a to higher frequencies. The nuclear spin-lattice relaxation rate 1/T1 measured at the central peak with H ∥ a shows a distinct decrease below Tc(μ0H = 12 T) = 16 K. Our results clearly show that antiferromagnetic order and superconductivity coexist at a microscopical length scale.

AB - We have performed nuclear magnetic resonance (NMR) measurements on an underdoped single-crystal Ba0. 77K0. 23Fe2As2 with Tc = 16. 5 K. Below TN = 46 K, an internal magnetic field splits the NMR peaks of H ∥ c and shifts those of H ∥ a to higher frequencies. The nuclear spin-lattice relaxation rate 1/T1 measured at the central peak with H ∥ a shows a distinct decrease below Tc(μ0H = 12 T) = 16 K. Our results clearly show that antiferromagnetic order and superconductivity coexist at a microscopical length scale.

KW - Antiferromagnetism

KW - Iron pnictides

KW - Nuclear magnetic resonance

KW - Superconductivity

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