Thermal Conductivity of KMnF_3, KCoF_3, KNiF_3, and KZnF_3 Single Crystals

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概要

• 論文の詳細を見る

• The thermal conductivity of single crystals of KMnF_3, KCoF_3, KNiF_3, and KZnF_3 has been measured in the temperature range of 15° to 30°K by the absolute longitudinal heat-flow method. These compounds have the same crystal structure of the perovskite type and are antiferromag netic except for diamagnetic KZnF_3. The anomalous decreases are shown in the temperature dependence of the thermal conductivity for the magnetic crystals of KMnF_3 and KCoF_3 at their Neel temperatures of 88°and 114°K respectively, but KNiF_3 has no anomaly at its Neel temperature of 275°K. These anomalies are seemed to be due to the phonon-magnon scattering similarily to the cases of some magnetic substances. The diamagnetic KZnF_3 shows the normal behaviour of conduction, though the slope of the thermal conductivity versus temperature is somewhat lower owing to the impurity scattering of phonons than that being expected from Umklapp processes.

• 社団法人日本物理学会の論文
• 1964-09-05

著者

• Ikawa Hyo

  Electrical Communication Laboratory Nippon Telegraph And Telephone Public Corporation

• Suemune Yasutaka

  Electrical Communication Laboratory Nippon Telegraph And Telephone Public Corporation

• Suemune Yasutaka

  Electrical Communication Laboratories Nippon Telegraph And Telephone Public Corporation

• SUEMUNE Yasutaka

  Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation

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