The photopyroelectric technique has been used to study the critical behavior of thermal diffusivity and thermal conductivity of Cr2O3 at the antiferromagnetic-paramagnetic phase transition. Deviation from the conventional Van Hove theory has been observed and the results have been explained in terms of a uniaxial model (n=1) with energy conservation and a nonconserved order parameter. A sharp dip, due to critical slowing down, is present in the thermal diffusivity while the thermal conductivity shows no anomaly in the critical region. A power-law fit with a background contribution and a term to correct for the thermal-diffusivity anomaly gives a critical exponent b=-0.09±0.02 and a critical amplitude ratio of U+/U-=0.51. © 1994 The American Physical Society.
Marinelli, M., Mercuri, F., Zammit, U., Pizzoferrato, R., Scudieri, F., & Dadarlat, D. (1994). Critical behavior of thermal diffusivity and thermal conductivity of Cr2O3 at the Néel transition. PHYSICAL REVIEW. B, CONDENSED MATTER, 49(6), 4356-4359.
Tipologia: | Articolo su rivista |
Citazione: | Marinelli, M., Mercuri, F., Zammit, U., Pizzoferrato, R., Scudieri, F., & Dadarlat, D. (1994). Critical behavior of thermal diffusivity and thermal conductivity of Cr2O3 at the Néel transition. PHYSICAL REVIEW. B, CONDENSED MATTER, 49(6), 4356-4359. |
Lingua: | English |
Settore Scientifico Disciplinare: | Settore FIS/01 - Fisica Sperimentale Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin) |
Revisione (peer review): | Esperti anonimi |
Tipo: | Articolo |
Rilevanza: | Rilevanza internazionale |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevB.49.4356 |
Stato di pubblicazione: | Pubblicato |
Data di pubblicazione: | 1994 |
Titolo: | Critical behavior of thermal diffusivity and thermal conductivity of Cr2O3 at the Néel transition |
Autori: | |
Autori: | Marinelli, M; Mercuri, F; Zammit, U; Pizzoferrato, R; Scudieri, F; Dadarlat, D |
Appare nelle tipologie: | 01 - Articolo su rivista |
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