Isothermal susceptibility in tetragonal phase of YBa2Cu3O6+2c
Abstract
Fluctuations in tetragonal phase of YBa2Cu3O6+2c compound are analyzed in terms of the two-dimensional asymmetric next-nearest-neighbor Ising (ASYNNNI) model. For several sets of interaction constants between oxygen atoms, VI GT 0. V-2 LT 0 and V-3 GT 0, we calculated equidistant mu (c, T) = constant curves to show that largest fluctuations of oxygen concentration in tetragonal phase occur for chemical potential mu approximate to mu (g1), where mu (g1) = -8V(1) - 4V(3). We argue that this is a general property of the ASYNNNI model: it holds for all temperatures and different values of interaction constants. Analyzing the experimental results on isothermal susceptibility, chi = sigmac/sigma mu for six different temperatures ranging from 673 to 923 K, we found that the top of chi occurs for approximately the same value of oxygen chemical potential in gas phase which corresponds to mu (gi) of the ASYNNNI model. By comparison with experiment, we obtained the relation, 4 \V-2\ - epsilon = 8...2 mRy, where epsilon is the on-site energy of the basal plane oxygen atoms. (C) 2001 Elsevier Science B.V. All rights reserved.
Keywords:
susceptibility / tetragonal phase / phase diagramSource:
Physica. C: Superconductivity and Its Applications, 2001, 349, 3-4, 246-250
DOI: 10.1016/S0921-4534(00)01543-4
ISSN: 0921-4534
WoS: 000166656100010
Scopus: 2-s2.0-0035124316
Collections
Institution/Community
VinčaTY - JOUR AU - Matić, Vladimir M. AU - Milić, Mirjana M. AU - Tornau, EE AU - Lapinskas, S AU - Lazarov, Nenad Đ. PY - 2001 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2409 AB - Fluctuations in tetragonal phase of YBa2Cu3O6+2c compound are analyzed in terms of the two-dimensional asymmetric next-nearest-neighbor Ising (ASYNNNI) model. For several sets of interaction constants between oxygen atoms, VI GT 0. V-2 LT 0 and V-3 GT 0, we calculated equidistant mu (c, T) = constant curves to show that largest fluctuations of oxygen concentration in tetragonal phase occur for chemical potential mu approximate to mu (g1), where mu (g1) = -8V(1) - 4V(3). We argue that this is a general property of the ASYNNNI model: it holds for all temperatures and different values of interaction constants. Analyzing the experimental results on isothermal susceptibility, chi = sigmac/sigma mu for six different temperatures ranging from 673 to 923 K, we found that the top of chi occurs for approximately the same value of oxygen chemical potential in gas phase which corresponds to mu (gi) of the ASYNNNI model. By comparison with experiment, we obtained the relation, 4 \V-2\ - epsilon = 82 mRy, where epsilon is the on-site energy of the basal plane oxygen atoms. (C) 2001 Elsevier Science B.V. All rights reserved. T2 - Physica. C: Superconductivity and Its Applications T1 - Isothermal susceptibility in tetragonal phase of YBa2Cu3O6+2c VL - 349 IS - 3-4 SP - 246 EP - 250 DO - 10.1016/S0921-4534(00)01543-4 ER -
@article{ author = "Matić, Vladimir M. and Milić, Mirjana M. and Tornau, EE and Lapinskas, S and Lazarov, Nenad Đ.", year = "2001", abstract = "Fluctuations in tetragonal phase of YBa2Cu3O6+2c compound are analyzed in terms of the two-dimensional asymmetric next-nearest-neighbor Ising (ASYNNNI) model. For several sets of interaction constants between oxygen atoms, VI GT 0. V-2 LT 0 and V-3 GT 0, we calculated equidistant mu (c, T) = constant curves to show that largest fluctuations of oxygen concentration in tetragonal phase occur for chemical potential mu approximate to mu (g1), where mu (g1) = -8V(1) - 4V(3). We argue that this is a general property of the ASYNNNI model: it holds for all temperatures and different values of interaction constants. Analyzing the experimental results on isothermal susceptibility, chi = sigmac/sigma mu for six different temperatures ranging from 673 to 923 K, we found that the top of chi occurs for approximately the same value of oxygen chemical potential in gas phase which corresponds to mu (gi) of the ASYNNNI model. By comparison with experiment, we obtained the relation, 4 \V-2\ - epsilon = 82 mRy, where epsilon is the on-site energy of the basal plane oxygen atoms. (C) 2001 Elsevier Science B.V. All rights reserved.", journal = "Physica. C: Superconductivity and Its Applications", title = "Isothermal susceptibility in tetragonal phase of YBa2Cu3O6+2c", volume = "349", number = "3-4", pages = "246-250", doi = "10.1016/S0921-4534(00)01543-4" }
Matić, V. M., Milić, M. M., Tornau, E., Lapinskas, S.,& Lazarov, N. Đ.. (2001). Isothermal susceptibility in tetragonal phase of YBa2Cu3O6+2c. in Physica. C: Superconductivity and Its Applications, 349(3-4), 246-250. https://doi.org/10.1016/S0921-4534(00)01543-4
Matić VM, Milić MM, Tornau E, Lapinskas S, Lazarov NĐ. Isothermal susceptibility in tetragonal phase of YBa2Cu3O6+2c. in Physica. C: Superconductivity and Its Applications. 2001;349(3-4):246-250. doi:10.1016/S0921-4534(00)01543-4 .
Matić, Vladimir M., Milić, Mirjana M., Tornau, EE, Lapinskas, S, Lazarov, Nenad Đ., "Isothermal susceptibility in tetragonal phase of YBa2Cu3O6+2c" in Physica. C: Superconductivity and Its Applications, 349, no. 3-4 (2001):246-250, https://doi.org/10.1016/S0921-4534(00)01543-4 . .