Electrical transport properties and magnetic cluster glass behavior of Nd 0.7 Sr 0.3 Mn O 3 nanoparticles Magnetoresistance and electrical hysteresis in stable half-metallic La 0.7 Sr 0.3 MnO 3 and Fe 3 O 4 nanoconstrictions Appl. Phys. Lett. Spin-dependent varistor-like electrical transport is found in Nd 0.7 Sr 0.3 MnO 3−␦ polycrystalline ceramics with slight oxygen deficient ␦ ജ 0.05. The current-voltage I͑V͒ curve shows nonlinearOhmic characteristics below a critical temperature. Electrical-field-induced changes of the spin array orientations inside of and between the magnetic domains over grain or phase boundaries have to be concluded for the strong electroresistive effect in Nd 0.7 Sr 0.3 MnO 3−␦ series.
Interface-dependent electric-pulse-induced resistance switching effect (EPIR) in Nd 0⋅7 Sr 0⋅3 MnO 3 ceramics was studied. The results reveal that the EPIR effect originates from the interface between the electrodes and the bulk, and the EPIR ratio as well as the high and low resistance states can be strongly influenced by applying a large electrical field on the sample for different intervals. Also, the pulse parameters have great effect on the stability of EPIR and the optimal pulse width, pulse amplitude and read bias are obtained. Based on the space charge limited current mechanism together with the theory of interfacial charge-trapped state, the interface-dependent resistance switching effect is discussed.
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