Metal–Insulator Transitions and Magnetic Ordered States in Oxygen–Depleted Manganites (original) (raw)

Physica B-condensed Matter, 2006

Paulo Noronha LisboaPaulo Noronha Lisboa

Abstract

The use of AC/DC magnetic susceptibility and impedance measurements to detect oxygen depletion effects in La 0.7 Ca 0.3 MnO 3±δ and NiMn 2 O 4±δ spinel-type compounds is reported. For the NiMn 2 O 4 , for which no Mn 4+ was found, three superposed Debye relaxations were ...

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