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- W1567440968 abstract "A combination of x-ray diffraction, magnetization, and $^{75}mathrm{As}$ nuclear magnetic resonance (NMR) experiments were performed on single-crystal EuFe${}_{1.9}$Co${}_{0.1}$As${}_{2}$. The strength of the hyperfine interaction between the $^{75}mathrm{As}$ nuclei and the Eu${}^{2+}$ 4$f$ states suggests a strong coupling between the Eu${}^{2+}$ moments and the Fe${}_{1.9}$Co${}_{0.1}$As${}_{2}$ layers. Such a strong interlayer coupling may be due to an indirect exchange interaction between the localized Eu${}^{2+}$ 4$f$ moments, mediated by the Fe 3$d$ conduction electrons. Magnetic susceptibility as well as $^{75}mathrm{As}$-NMR measurements reveal a decrease of the SDW transition temperature to ${T}_{mathrm{SDW}}$ $=$ 120 K as a result of Co doping. A change of the slope in the temperature dependence of the NMR frequency of the $^{75}mathrm{As}$ lower-satellite line was observed at 225 K. At the same temperature also a change of the satellite line shape was found. These changes of the NMR spectra may be caused by the formation of a nematic phase below 225 K in EuFe${}_{1.9}$Co${}_{0.1}$As${}_{2}$." @default.
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- W1567440968 date "2011-04-19" @default.
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- W1567440968 title "Strong coupling between Eu<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>spins and Fe<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>As<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><…" @default.
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- W1567440968 doi "https://doi.org/10.1103/physrevb.83.144516" @default.
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