Temperature and concentration dependences of specific heat of Bi₁-xSbx solid solutions

• Veröffentlicht in: Functional Materials
• Datum: 2018
• Hauptverfasser: Rogacheva, E.I., Doroshenko, A.N., Nashchekina, O.N.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: НТК «Інститут монокристалів» НАН України 2018
• Schlagworte: Characterization and properties
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/157424
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Temperature and concentration dependences of specific heat of Bi₁-xSbx solid solutions / E.I. Rogacheva, A.N. Doroshenko, O.N. Nashchekina // Functional Materials. — 2018. — Т. 25, № 4. — С. 720-728. — Бібліогр.: 42 назв. — англ.

For Bi₁-xSbx solid solutions, the concentration (x = 0 - 0.12) and temperature (170-525 K) dependences of specific heat Cp were obtained. At all temperatures studied, three peaks of Cp were observed near x = 0.015, x = 0.037, and x = 0.07. The observed effects were attributed to critical phenomena accompanying the second-order phase transitions: percolation transition from dilute to concentrated solid solutions, the transition to a gapless state, and the semimetal-semiconductor transition, respectively. It was shown that the values of critical indexes (α = 0.11±0.01) are the same not only for different peaks but also for different temperatures and correspond to the values theoretically calculated within the framework of scale-invariant theory for three-dimensional (3D) models.