Phonon and Specific Heat Analyses in Rare-Earth Hexaborides

✍ Scribed by S. Kunii; K. Takahashi; K. Iwashita

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 154 KB
• Volume: 154
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8849

✦ Synopsis

Systematic analyses of the speci5c heat of rare-earth hexaborides are presented using phonon data. Similarity of phonon dispersion curves at lower frequency is found for the rare-earth hexaborides. By this fact, it becomes possible to deduce unknown phonon dispersion curves. We can calculate the phonon speci5c heat precisely using phonon dispersion curves. Magnetic entropy is derived for GdB 6 , TbB 6 , DyB 6 , and HoB 6 , indicating their magnetic ground states which are consistent with a point-charge model developed by K. R.