Low-temperature resistivity minimum in ceramic manganites
نویسندگان
چکیده
منابع مشابه
Magnon scattering processes and low temperature resistivity in CMR manganites
Low temperature resistivity of CMR manganites is investigated. At the ground state, conduction electrons are perfectly spin polarized, which is called half-metallic. From one-magnon scattering processes, it is discussed that the resistivity of a half metal as a function of temperature scales as ρ(T )− ρ(0) ∝ T . We take (Nd0.8Tb0.2)0.6Sr0.4MnO3 as an example to compare theory and experiments. T...
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Pairing of oxygen holes into heavy bipolarons in the paramagnetic phase and their magnetic pair breaking in the ferromagnetic phase (the so-called current-carrier density collapse) has accounted for the first-order ferromagnetic-phase transition, colossal magnetoresistance, isotope effect, and pseudogap in doped manganites. Here we propose an explanation of the phase coexistence and describe th...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2000
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.1288704