Magnetic susceptibility and low-field ESR of an organic ion-radical salt, tri-p-tolylaminiumyl chloroantimonate.

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概要

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• The static magnetic susceptibility and the low-field ESR spectra (33.6 and 135 MHz) of powder samples of tri-<I>p</I>-tolylaminiumyl chloroantimonate were measured above 1.7 K. A broad maximum in the susceptibility, which indicates an antiferromagnetic interaction, was observed at 6.0 K; this is consistent with the results of the proton NMR measurements. In the low-field ESR spectra, broadening of the <I>g</I>=2 absorption line and distinct appearance of the <I>g</I>=4 absorption line were observed in the temperature region below <I>T</I><SUB>m</SUB>, the temperature at which the susceptibility is maximum. The results are interpreted by assuming that the magnetic behavior is due to antiferromagnetic Heisenberg linear chains. An abrupt decrease in the <I>g</I>=2 absorption intensity and a rapid increase in the <I>g</I>=2 absorption linewidth were also found in the temperature range from 3.5 to 2.5 K, while a slight rise in the susceptibility was observed below 2.5 K. These anomalies may imply a magnetic-phase transition in the vicinity of 2.5 K.

• 公益社団法人 日本化学会の論文

著者

• Yoshioka Toshio

  Department of Chemistry, Faculty of Science, Kyoto University

関連論文

• Magnetic susceptibility and low-field ESR of an organic ion-radical salt, tri-p-tolylaminiumyl chloroantimonate.
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