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- W2068768084 abstract "The infrared reflectance spectra of hot-pressed CdCr2S4 and CdCr2Se4 have been measured at temperatures above and below the Curie temperature. Two strong reflectance peaks are observed for these materials. These reflectance peaks are attributed to the reststrahlen bands due to the ionic bonds between the positive metal ions and the negative chalcogen ions. From the reflectance spectra, the transverse and the longitudinal optical phonon frequencies and the static dielectric constants are calculated. At room temperature, ωLO=389.9 cm−1 and 347.2 cm−1, ωTO=376.9 cm−1 and 321.6 cm−1, and ε0=9.79 for CdCr2S4; and ωLO=291.4 cm−1 and 281.3 cm−1, ωTO=288.1 cm−1 and 266.2 cm−1, and ε0=10.3 for CdCr2Se4. At liquid-nitrogen temperature, the phonon frequencies are increased approximately by 1%." @default.
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- W2068768084 date "1971-03-15" @default.
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- W2068768084 title "Infrared Reflectance of CdCr2S4and CdCr2Se4" @default.
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- W2068768084 doi "https://doi.org/10.1063/1.1660283" @default.
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