Spin Dynamics across Metallic Layers on the Few-Femtosecond Timescale.

We measure the light-driven response of a magnetic multilayer structure made of thin alternating layers of cobalt and platinum at the few-femtosecond timescale. Using attosecond magnetic circular dichroism, we observe how light rearranges the magnetic moment during and after excitation. The results reveal a sub-5 fs spike of magnetization in the platinum layer, which follows the shape of the driving pulse.

Layer-resolved ultrafast extreme ultraviolet measurement of hole transport in a Ni-TiO-Si photoanode.

Metal oxide semiconductor junctions are central to most electronic and optoelectronic devices, but ultrafast measurements of carrier transport have been limited to device-average measurements. Here, charge transport and recombination kinetics in each layer of a Ni-TiO-Si junction is measured using the element specificity of broadband extreme ultraviolet (XUV) ultrafast pulses. After silicon photoexcitation, holes are inferred to transport from Si to Ni ballistically in ~100 fs, resulting in characteristic spectral shifts in the XUV edges.

[Urothelial cancers from Endoxan].

A case of carcinoma of the bladder in a patient treated for 20 years with Endoxan is reported. The role of this drug in the aetiology of an urothelial carcinoma was appeared to be demonstrated by the 35 published cases in the literature and should lead to a limitation of its prescription and to regulate urological surveillance of patients receiving the agent.