Non-linear current-voltage characteristics of (La0.5Eu0.5)(0.7)Pb0.3MnO3 single crystals: Possible manifestation of the internal heating of charge carriers | Научно-инновационный портал СФУ

Non-linear current-voltage characteristics of (La0.5Eu0.5)(0.7)Pb0.3MnO3 single crystals: Possible manifestation of the internal heating of charge carriers

Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1016/j.physb.2010.09.043

Ключевые слова: Manganites, Negative differential resistance, CVC, Applied electric field, Charge ordering, Current switching, Dielectric regions, Experimental data, Internal heating, Lanthanum manganites, Metal-dielectric transition, Negative differential resistances, Non equilibrium, Non-linear, Sample heating, Temperature evolution, Transport currents, Electric fields, Electron gas, Europium, Heating, Lanthanum, Lead, Negative resistance, Phase separation, Single crystals, Thermal conductivity, Manganese oxide

Аннотация: Temperature evolution of the current-voltage characteristics (CVCs) of a single-crystal lanthanum manganite (La0.5Eu0.5)(0.7)Pb0.3MnO3 is investigated in a wide (up to 1 A) range of instrumental currents. Effects of a transport current and an applied electric field on the resistance of the material are studied in view of possible implementation of the charge ordering break in dielectric regions occurring due to phase separation in manganites. A negative differential resistance portion observed in the CVCs suggests the presence of a current switching effect. Below the temperature of the metal-dielectric transition in (La0.5Eu0.5)(0.7)Pb0.3MnO3, the hysteresis is observed in the CVC. The detailed analysis of the internal sample heating on the basis of experimental data on thermal conductivity showed, however, that these CVC features can be explained within the concept of non-equilibrium heating of electron gas. (C) 2010 Elsevier B.V. All rights reserved.

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Издание

Журнал: PHYSICA B-CONDENSED MATTER

Выпуск журнала: Vol. 405, Is. 24

Номера страниц: 4961-4965

ISSN журнала: 09214526

Место издания: AMSTERDAM

Издатель: ELSEVIER SCIENCE BV

Авторы

  • Shaykhutdinov K.A. (Siberian Federal University)
  • Popkov S.I. (Siberian Federal University)
  • Balaev D.A. (Siberian Federal University)
  • Semenov S.V. (Kirensky Institute of Physics,Russian Academy of Sciences,Siberian Branch)
  • Bykov A.A. (Kirensky Institute of Physics,Russian Academy of Sciences,Siberian Branch)
  • Dubrovskiy A.A. (Siberian Federal University)
  • Sapronova N.V. (Kirensky Institute of Physics,Russian Academy of Sciences,Siberian Branch)
  • Volkov N.V. (Siberian Federal University)

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