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 iПоказать полностьюmplementation 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.
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