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- W2777416907 abstract "The coexistence of a new-type antiferromagnetic (AFM) state, the so-called hedgehog spin-vortex crystal (SVC), and superconductivity (SC) is evidenced by an $^{75}mathrm{As}$ nuclear magnetic resonance study on single-crystalline $mathrm{CaK}{({mathrm{Fe}}_{0.951}{mathrm{Ni}}_{0.049})}_{4}{mathrm{As}}_{4}$. The hedgehog SVC order is clearly demonstrated by the direct observation of internal magnetic induction along the $c$ axis at the As1 site (close to K) and a zero net internal magnetic induction at the As2 site (close to Ca) below an AFM ordering temperature ${T}_{mathrm{N}}ensuremath{sim}52$ K. The nuclear spin-lattice relaxation rate $1/{T}_{1}$ shows a distinct decrease below ${T}_{mathrm{c}}ensuremath{sim}10$ K, providing also unambiguous evidence for the microscopic coexistence. Furthermore, based on the analysis of the $1/{T}_{1}$ data, the hedgehog SVC-type spin correlations are found to be enhanced below $Tensuremath{sim}150$ K in the paramagnetic state. These results indicate the hedgehog SVC-type spin correlations play an important role for the appearance of SC in the new magnetic superconductor." @default.
- W2777416907 created "2018-01-05" @default.
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- W2777416907 date "2017-12-29" @default.
- W2777416907 modified "2023-10-16" @default.
- W2777416907 title "NMR study of the new magnetic superconductor <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>CaK</mml:mi><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>Fe</mml:mi><mml:mrow><mml:mn>0.951</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Ni</mml:mi><mml:mrow><mml:mn>0.049</mml:mn></mml:mrow></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> : Microscopic …" @default.
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- W2777416907 doi "https://doi.org/10.1103/physrevb.96.220510" @default.
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