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- W1978212022 abstract "We investigated the magnetism under a magnetic field in the quasi-two-dimensional organic Mott insulator $ensuremath{kappa}text{ensuremath{-}}{(text{BEDT-TTF})}_{2}text{Cu}[text{N}{(text{CN})}_{2}]text{Cl}$ through magnetization and $^{13}text{C}text{-NMR}$ measurements. We found that in the nominally paramagnetic phase (i.e., above N'eel temperature) the field-induced local moments have a staggered component perpendicular to the applied field. As a result, the antiferromagnetic transition well defined at a zero field becomes crossover under a finite field. This unconventional behavior is qualitatively reproduced by the molecular-field calculation for Hamiltonian including the exchange, Dzyaloshinsky-Moriya (DM), and Zeeman interactions. This calculation also explains other unconventional magnetic features in $ensuremath{kappa}text{ensuremath{-}}{(text{BEDT-TTF})}_{2}text{Cu}[text{N}{(text{CN})}_{2}]text{Cl}$ reported in the literature. The present results highlight the importance of the DM interaction in field-induced magnetism in a nominally paramagnetic phase, especially in low-dimensional spin systems." @default.
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- W1978212022 date "2008-11-05" @default.
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- W1978212022 title "Field-induced staggered magnetic moment in the quasi-two-dimensional organic Mott insulator<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>κ</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mtext>BEDT-TTF</mml:mtext></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:mtext>Cu</mml:mtext><mml:mrow><mml:mo>[</mml:mo><mml:mrow><mml:mtext>N</mml:mtext><mml:msub><mml:mrow><mml:…" @default.
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- W1978212022 doi "https://doi.org/10.1103/physrevb.78.184402" @default.
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