Abstract
Electrical transport properties as a function of magnetic field and time have been investigated in polycrystalline,Nd0.84Sr0.16CoO3. A strong exchange bias (EB) effect is observed associated with the fairly largeintragranular magnetoresistance (MR). The EB effect observed in the MR curve iscompared with the EB effect manifested in the magnetic hysteresis loop. A trainingeffect, described as the decrease of EB effect when the sample is successively fieldcycled at a particular temperature, has been observed in the shift of the MRcurve. The training effect could be analyzed by successful models. The EB effect,MR and a considerable time dependence in MR are attributed to the intrinsicnanostructure giving rise to varieties of magnetic interfaces in the grain interior.
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