LAUSR

The granular magnetic systems consisting of magnetic nanoparticles embedded in a nonmagnetic metallic matrix have emerged as an attractive building block nanodevices. A key challenge for building interface-based nanodevice applications, such as magnetic memories, is how to clearly know about the influences of interfacial roughness on the scatting of conduction electrons. Here, we demonstrate a granular magnetic system composed by Co and Cu nanoparticles and further link the atomic structure of Co-Cu interface to the scattering mechanism of conduction electrons. The multiple scattering is caused by the dislocations at the rough interface, which leads to the reduction of conduction efficiency and increase of energy consumption. These dislocations mostly originate from the lattice defects on the surface of nanoparticles, the lattice mismatch of two crystal structures and the different surface energies. Based on the negative effects of rough interface on the electronic transport, we firstly develop a nano metal-fuse resistor which could hopefully be used in the protection circuits of nanodevices. Our results may open up the possibility of implementing the low-dimensional granular magnetic materials in nanodevice applications.