Structural and magneto-transport features of cobalt-substituted mixed-valence manganites

Interface based field effect configuration and charge conduction mechanisms for manganite thin film heterostructures

“…[1][2][3] Mixed valent manganites are known for electronic (low temperature metal to high temperature insulator) and magnetic (low temperature ferromagnetic to high temperature paramagnetic) phase transitions at T P and T C , respectively, concomitant with a large magnetoresistance (MR). [4][5][6][7] Various theories, models and mechanisms have been proposed to explain the transport and magnetic nature of these compounds including the ZDE mechanism, Jahn-Teller (JT) effect, charge ordering (CO), orbital ordering (OO), spin ordering (SO), phase separation and phase coexistence, electronelectron scattering processes, Kondo effect, ZDE polynomial law, small polaron conduction for metals, variable range hopping mechanism, etc. These mixed valent manganites have been studied extensively in their different forms including polycrystalline bulk, nanostructure, heterostructure, device, thin film, multilayer, etc.…”