The ability to generate pure-spin currents using the non-local spin valve (NLSV) has established it as an opportune device for testing spin transport on nanoscopic dimensions, with potential technological applications. The geometry has been used extensively to probe relaxation in a host of materials including non-magnetic metals. Nevertheless, interpretation of the non local ‘spin signal’ obtained in such a device relies on a precise ability to separate out pure spin transport and background effects.
In this talk I will present insights obtained from all-metallic NLSVs. Recent results, systematically investigating the spin signal generated in such devices has allowed us to isolate several effects which limit the generation and detection of spin signals in NLSVs. I will present findings on the interface, impurity scattering and thermoelectric contributions in such devices, including the background signals they generate.
I will also discuss the concept of thermal nanoscale conversion: using a heated scanning probe tip to locally modify the properties of magnetic thin films or devices. I will show how this offers new ways to design spintronic and non-local devices.
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