Рубрики:
INSULATOR-METAL TRANSITION
PR0.7CA0.3MNO3
MANGANITES
Кл.слова (ненормированные):
Manganites -- Negative differential resistance -- CVC -- CVC -- Manganites -- Negative differential resistance -- Applied electric field -- Charge ordering -- Current switching -- CVC -- 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 -- Manganites -- Negative resistance -- Phase separation -- Single crystals -- Thermal conductivity -- Manganese oxide
INSULATOR-METAL TRANSITION
PR0.7CA0.3MNO3
MANGANITES
Кл.слова (ненормированные):
Manganites -- Negative differential resistance -- CVC -- CVC -- Manganites -- Negative differential resistance -- Applied electric field -- Charge ordering -- Current switching -- CVC -- 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 -- Manganites -- 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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Держатели документа:
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Semenov, S. V.
Bykov, A. A.
Dubrovskiy, A. A.
Sapronova, N. V.
Volkov, N. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shaykhutdinov, K. A.
Popkov, S. I.
Balaev, D. A.
Dubrovskiy, A. A.
Volkov, N. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Semenov, S. V.; Семенов, Сергей Васильевич; Bykov, A. A.; Быков, Алексей Анатольевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Sapronova, N. V.; Volkov, N. V.; Волков, Никита Валентинович