Oxygen transport in perovskite and related oxides: A brief review

Chroneos, Alexander; Вовк, Р. В.; Goulatis, Ι. L.; Goulatis, L. I.

doi:10.1016/j.jallcom.2010.01.071

Cited by 140 publications

(105 citation statements)

References 96 publications

(120 reference statements)

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“…The activation energy value obtained from our data Е А ≈ 0.94 eV is slightly lower than the typical values for the YВа 2 Сu 3 О 7-δ compounds with reduced oxygen concentration [16]. It should also be noted that all the characteristic shape changes in the temperature dependence and absolute values of the resistivity parameters that where observed in the isobaric annealing process at room temperatures, in НоВа 2 Сu з О 7-δ were more pronounced compared to YВа 2 Сu 3 О 7-δ .…”

Section: Calculations Using Eq (3) Demonstrate That the Equilibrium contrasting

confidence: 68%

Phase separation in oxygen deficient ΗοBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries

Вовк¹,

Nazyrov²,

Obolenskii³

et al. 2011

Philosophical Magazine

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Section: Calculations Using Eq (3) Demonstrate That the Equilibrium contrasting

confidence: 68%

Phase separation in oxygen deficient ΗοBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries

Вовк¹,

Nazyrov²,

Obolenskii³

et al. 2011

Philosophical Magazine

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“…The activation energy obtained from our data E A ≈ 0.94 eV is slightly lower than the typical values for the YBa 2 Cu 3 O 7−δ compounds with reduced oxygen concentration [11]. It should also be noted that all the characteristic shape changes in the temperature dependence and absolute values of the resistivity parameters that were observed in the isobaric annealing process at room temperature were more pronounced in HoBa 2 Cu 3 O 7−δ than in YBa 2 Cu 3 O 7−δ .…”

Section: Rv Vovk Et Alcontrasting

confidence: 69%

Effect of Oxygen Redistribution on Temperature Dependence of Pseudo-Gap in Underdoped HoBa₂Cu₃O_7-δSingle Crystals

Вовк¹,

Nazyrov²,

Obolenskii³

et al. 2011

Acta Phys. Pol. A

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The effect of annealing at room temperature on the excess conductivity of oxygen deficient HoBa2Cu3O 7−δ single crystal is studied. It is shown that there is substantial extension of the interval of linear dependence ρ ab (T ) and narrowing of the temperature area of the pseudo-gap regime as a result of annealing. The excess conductivity satisfies the exponential temperature dependence in a wide temperature interval. The temperature dependence of the pseudogap is satisfactorily described by the BCS-BEC theoretical model.

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“…The diffusion process is similar to the interstitialcy mechanism predicted for La 2 NiO 4+d . 3,22 It proceeds via the promotion of an apical oxygen ion into an adjacent interstitial site leaving a vacant site on one of the NiO 6 octahedra. This vacant site is then filled by a second neighbouring interstitial site.…”

Section: Resultsmentioning

confidence: 99%

Molecular dynamics study of oxygen diffusion in Pr2NiO4+δ

Parfitt

Chroneos

Kilner

et al. 2010

Phys. Chem. Chem. Phys.

103

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Oxygen transport in tetragonal Pr 2 NiO 4+d has been investigated using molecular dynamics simulations in conjunction with a set of Born model potentials. Oxygen diffusion in Pr 2 NiO 4+d is highly anisotropic, occurring almost entirely via an interstitialcy mechanism in the a-b plane. The calculated oxygen diffusivity has a weak dependence upon the concentration of oxygen interstitials, in agreement with experimental observations. In the temperature range 800-1500 K, the activation energy for migration varied between 0.49 and 0.64 eV depending upon the degree of hyperstoichiometry. The present results are compared to previous work on oxygen self-diffusion in related K 2 NiF 4 structure materials.

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Oxygen transport in perovskite and related oxides: A brief review

Cited by 140 publications

References 96 publications

Phase separation in oxygen deficient ΗοBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries

Phase separation in oxygen deficient ΗοBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries

Effect of Oxygen Redistribution on Temperature Dependence of Pseudo-Gap in Underdoped HoBa₂Cu₃O_7-δSingle Crystals

Molecular dynamics study of oxygen diffusion in Pr2NiO4+δ

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Oxygen transport in perovskite and related oxides: A brief review

Cited by 140 publications

References 96 publications

Phase separation in oxygen deficient ΗοBa2Cu3O7-δ single crystals: effect of high pressure and twin boundaries

Phase separation in oxygen deficient ΗοBa2Cu3O7-δ single crystals: effect of high pressure and twin boundaries

Effect of Oxygen Redistribution on Temperature Dependence of Pseudo-Gap in Underdoped HoBa2Cu3O7-δSingle Crystals

Molecular dynamics study of oxygen diffusion in Pr2NiO4+δ

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Phase separation in oxygen deficient ΗοBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries

Phase separation in oxygen deficient ΗοBa₂Cu₃O_7-δ single crystals: effect of high pressure and twin boundaries

Effect of Oxygen Redistribution on Temperature Dependence of Pseudo-Gap in Underdoped HoBa₂Cu₃O_7-δSingle Crystals