Jahn-Teller Phase Transitions in Non-Stoichiometric Oxides with Perovskite Structure: Effect of Mechanical Activation

Anatoly Yakovlevich Fishman; Nickolai Tkachev

doi:10.4028/www.scientific.net/DDF.334-335.353

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Jahn-Teller Phase Transitions in Non-Stoichiometric Oxides with Perovskite Structure: Effect of Mechanical Activation

Abstract:

Structure phase transitions in nonstoichiometry oxides with perovskite structure were considered. The microscopic description of cooperative Jahn-Teller transition was suggested and the effects caused by mechanical activation of oxide systems (their conversion into nanostructural state, acceleration of oxidation-renewal reactions and immiscibility) were analized. The correspondence of the theoretical results to the data of experiment on phase states of mechanically activated oxide NdMnO₃ is shown.

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Periodical:

Defect and Diffusion Forum (Volumes 334-335)

Pages:

353-358

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.334-335.353

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Online since:

February 2013

Authors:

Anatoly Yakovlevich Fishman, Nickolai Tkachev

Keywords:

Jahn-Teller Effect, Mechanical Activation, Nanoparticle, Nonstoichiometry, Perovskite, Redox Processes, Structure Phase Transitions

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