Low-temperature phase segregation in La₂/₃Ba₁/₃MnO₃: Manifestation of nonequilibrium thermodynamics
Thermodynamic characteristics of the perovskite-like compound La₂/₃Ba₁/₃MnO₃ exhibiting structural phase transformation of the martensitic type with characteristic temperature Ts = 200 K have been studied in the temperature range 2–340 K. Step-like hysteretic temperature behavior of the effective...
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| Datum: | 2009 |
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| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2009
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| Schriftenreihe: | Физика низких температур |
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| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/118970 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Low-temperature phase segregation in La₂/₃Ba₁/₃MnO₃: Manifestation of nonequilibrium thermodynamics / A.B. Beznosov, E.L. Fertman, V.A. Desnenko, A. Feher,M. Kajòaková, C. Ritter, D. Khalyavin // Физика низких температур. — 2009. — Т. 35, № 6. — С. 571–577. — Бібліогр.: 31 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | Thermodynamic characteristics of the perovskite-like compound La₂/₃Ba₁/₃MnO₃ exhibiting structural
phase transformation of the martensitic type with characteristic temperature Ts = 200 K have been studied in the
temperature range 2–340 K. Step-like hysteretic temperature behavior of the effective heat capacity has been revealed
at 150–250 K and attributed to the discrete kinetics and a latent heat of the martensitic transformation.
Magnetic subsystem was found exhibiting magnetic glass state below 220 K and temperature hysteresis of the
magnetic susceptibility brightly pronounced in the 40–100 K and 180–230 K regions. The Debye and Einstein
temperatures, Ѳ D = 230 K and Ѳ E = 500 K, respectively, derived from the experimental Debye–Waller factors for
La/Ba, Mn and O sublattices, have been used to refine contributions from the structural and magnetic transformations
to the heat capacity and to reveal thermodynamically nonequilibrium states. |
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