Anomalous Temperature Dependence of Exchange Interactions in K_2CuCl_42H_2O and K_2CuCl_42D_2O
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概要
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Exchange interactions between two dissimilar Cu^<2+> ions in K_2CuCl_42H_2O and K_2CuCl_42D_2O were investigated by means of electron paramagnetic resonance (EPR). The measurements were done in the frequency range from 9.3 to 65.8 GHz between 10° and 370°K. An amalgamated single line was observed below 200°K but the line splits into two lines near room temperatures. Considering the frequency and temperature dependence of the phenomenon, it is concluded that the exchange interaction depends strongly on temperature. The magnetude of the exchange interaction J/k(°K) varies from 0.3 to 0.08 between 4° and 300°K. Similar temperature dependence was obtained in K_2CuCl_42D_2O and the exchange interaction in this compound was found to be about 0.02°K larger than of K_2CuCl_42H_2O.
- 社団法人日本物理学会の論文
- 1970-02-05
著者
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Date Muneyuki
Department Of Physics Faculity Of Science Osaka University
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Okuda Takashi
Department Of Applied Information Science And Technology Faculty Of Information Science And Technolo
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Okuda Takashi
Department Of Physics Faculty Of Science Osaka University
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