TY - JOUR
T1 - Microscopic coexistence of antiferromagnetic order and superconductivity in Ba 0.77K 0.23Fe 2As 2
AU - Li, Z.
AU - Zhou, R.
AU - Liu, Y.
AU - Sun, D. L.
AU - Yang, J.
AU - Lin, C. T.
AU - Zheng, Guo Qing
PY - 2012/11/5
Y1 - 2012/11/5
N2 - We report 75As nuclear magnetic resonance studies on an underdoped single-crystal Ba 0.77K 0.23Fe 2As 2 with T c=16.5 K. Below T N=46 K, the NMR peaks for Hc split and those for Ha shift to higher frequencies, which indicates that an internal magnetic field along the c axis develops below T N. The spin-lattice relaxation rate 1/T 1 measured at the shifted peak with Ha, which experiences the internal field, shows a distinct decrease below T c(μ 0H=12T)=16 K, following a T3 relation at low temperatures. Our results show unambiguously that antiferromagnetic order and superconductivity coexist microscopically. The unusual superconducting state with the coexisting magnetism is highlighted.
AB - We report 75As nuclear magnetic resonance studies on an underdoped single-crystal Ba 0.77K 0.23Fe 2As 2 with T c=16.5 K. Below T N=46 K, the NMR peaks for Hc split and those for Ha shift to higher frequencies, which indicates that an internal magnetic field along the c axis develops below T N. The spin-lattice relaxation rate 1/T 1 measured at the shifted peak with Ha, which experiences the internal field, shows a distinct decrease below T c(μ 0H=12T)=16 K, following a T3 relation at low temperatures. Our results show unambiguously that antiferromagnetic order and superconductivity coexist microscopically. The unusual superconducting state with the coexisting magnetism is highlighted.
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U2 - 10.1103/PhysRevB.86.180501
DO - 10.1103/PhysRevB.86.180501
M3 - Article
AN - SCOPUS:84869076397
SN - 1098-0121
VL - 86
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 18
M1 - 180501
ER -