Three-dimensional ordering of impurity-doped TMMC in a magnetic field |
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Authors: | Y Ajiro M Hamashima T Kubo |
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Institution: | 1. Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606, Japan;2. Department of Physics, Nara University of Education, Nara 630, Japan |
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Abstract: | The three-dimensional ordering temperatures of the quasi-one-dimensional antiferromagnet (CH3)4NMnCl3 containing 0, 0.13, 0.25 and 0.48 at% Cu2+ ions were studied as a function of an external magnetic field up to 60 kOe by means of proton NMR. A strong increase of TN(H) with H was found even for the impure system. The TN versus H curve for the pure system cam be explained by introducing a simple form for the effect of the field on the correlation length, ξ(T, H) = ξ(T) × 1+(λJ/kT)H2], while that for the impure system is unlike the one for the pure system. |
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