Exchange bias effect and intragranular magnetoresistance in Nd$ {0.84}Sr {0.16}CoO 3 - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: Electrical transport properties as a function of magnetic field and time havebeen investigated in polycrystalline, Nd {0.84}Sr {0.16}CoO 3. A strongexchange 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 magnetic hysteresis loop. Trainingeffect, described as the decrease of EB effect when the sample is successivelyfield-cycled at a particular temperature, has been observed in the shift of theMR curve. Training effect could be analysed by the successful models. The EBeffect, MR and a considerable time dependence in MR are attributed to theintrinsic nanostructure giving rise to the varieties of magnetic interfaces inthe grain interior.



Autor: M. Patra, S. Majumdar, S. Giri

Fuente: https://arxiv.org/







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