60 research outputs found
Colossal enhancement of magnetoresistance in LaSrMnO / PrCaMnO multilayers: reproducing the phase-separation scenario
Colossal enhancement of magnetoresistance has been achieved over a broad
temperature range which extends upto the room temperature, in ferromagnetic
metal-charge ordered insulator manganite multi-layers. The artificially created
phase coexistence in the multilayers reproduce the characteristic signatures of
metastability in the magnetotransport properties commonly observed in
electronically phase-separated manganites
Field-tunable stochasticity in the magnetization reversal of a cylindrical nanomagnet
The nature of magnetization reversal in an isolated cylindrical nanomagnet
has been studied employing time-resolved magnetoresistance measurement. We find
that the reversal mode is highly stochastic, occurring either by multimode or
single-step switching. Intriguingly, the stochasticity was found to depend on
the alignment of the driving magnetic field to the long axis of the nanowires,
where predominantly multimode switching gives way to single-step switching
behavior as the field direction is rotated from parallel to transverse with
respect to the nanowire axis.Comment: Accepted in Phys. Rev.
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