1
|
Grieshammer S, Zacherle T, Martin M. Entropies of defect formation in ceria from first principles. Phys Chem Chem Phys 2013; 15:15935-42. [DOI: 10.1039/c3cp51913a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
2
|
Sangster MJL, Harding JH. Calculation of local and gap mode frequencies from impurities in alkali halide crystals. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/19/31/011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
3
|
|
4
|
Gillan MJ, Harding JH, Tarento RJ. Calculation of defect migration rates by molecular dynamics simulation. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/20/16/009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
5
|
Gillan MJ, Harding JH, Leslie M. A comparison of methods for calculating defect entropies in ionic crystals. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/21/32/002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
6
|
Abstract
The quasielastic neutron scattering from fast-ion conductors with the fluorite structure has been interpreted alternatively as being due to either clusters of defects or to the motion of defects and their associated strain field. In this paper, we examine the hypothesis that the sharp rise in ionic conductivity that occurs in fluorites near the transition temperature (
T
c
) from normal to superionic conductivity, is associated with defect clustering. By using lattice simulation techniques it is shown that a wide variety of clusters are stable in SrCl
2
, CaF
2
, SrF
2
, BaF
2
and β-PbF
2
. A cluster consisting of two vacancies, two relaxed lattice ions and three interstitials (which we shall designate 2| 2| 3) is particularly stable. It is shown that the formation of 2| 2| 3 clusters results in an increase in the concentration of vacancies and that this increase can account quantitatively for the rise in conductivity near
T
c
. Our concern is thus with the possible connection of the onset of superionic conduction with defect clustering and we do not attempt, in this paper, any interpretation of the quasielastic neutron scattering.
Collapse
|
7
|
Scheffler M, Dabrowski J. Parameter-free calculations of total energies, interatomic forces and vibrational entropies of defects in semiconductors. ACTA ACUST UNITED AC 1988. [DOI: 10.1080/01418618808205178] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
Varotsos P. Thermodynamic criterion for the analysis of point-defect data in solids. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:6511-6512. [PMID: 9943903 DOI: 10.1103/physrevb.37.6511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
9
|
Press MR, Ellis DE. Defect clusters in wustite Fe1-xO. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 35:4438-4454. [PMID: 9941999 DOI: 10.1103/physrevb.35.4438] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
10
|
Calculation of Defect Processes at High Temperature. ACTA ACUST UNITED AC 1986. [DOI: 10.1007/978-1-4757-0761-8_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|