The GMR behavior of nanogranular samples is ruled by the interplay of their structural and magnetic features, the two properties being strictly interlaced. The structural features of a given sample not being easily adjustable (at least, in a reversible way), the GMR response is hardly tunable unless a method is envisaged of modifying the magnetic configuration only. For this purpose, a magnetic tool would be needed that acts on the nanoscale. We show that it is possible to tune the GMR of nanogranular systems through the exchange anisotropy, opening new perspectives towards the control of the magnetoresistive performance of properly engineered nanoparticle assemblies.
Magnetoresistance of granular Ni/NiO tuned by exchange anisotropy
DEL BIANCO, Lucia;SPIZZO, Federico;TAMISARI, Melissa;
2013
Abstract
The GMR behavior of nanogranular samples is ruled by the interplay of their structural and magnetic features, the two properties being strictly interlaced. The structural features of a given sample not being easily adjustable (at least, in a reversible way), the GMR response is hardly tunable unless a method is envisaged of modifying the magnetic configuration only. For this purpose, a magnetic tool would be needed that acts on the nanoscale. We show that it is possible to tune the GMR of nanogranular systems through the exchange anisotropy, opening new perspectives towards the control of the magnetoresistive performance of properly engineered nanoparticle assemblies.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
