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Field-induced magnetic ordering in the quantum spin system<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">KCuCl</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Field-induced magnetic ordering in the quantum spin system<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">KCuCl</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

${\mathrm{KCuCl}}_{3}$ is a three-dimensional coupled spin-dimer system and has a singlet ground state with an excitation gap $\ensuremath{\Delta}{/k}_{\mathrm{B}}=31\mathrm{K}.$ High-field magnetization measurements for ${\mathrm{KCuCl}}_{3}$ have been performed in static magnetic fields of up to 30 T and in pulsed magnetic fields of up to 60 T. The entire magnetization curve including …