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Design007-June2019

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JUNE 2019 I DESIGN007 MAGAZINE 53 PCB Design Events Realize LIVE • June 10–13, 2019: Detroit, MI PCB2Day • Controlling noise, EMI, and signal integrity in high-speed circuits and PCBs • June 13–14: Boston (Chelmsford), MA IPC SummerCom • Standards development committee meetings featuring Panelpalooza • June 15–20: Raleigh, NC PCB West 2019 • September 9–11: Santa Clara, CA AltiumLive 2019 • October 9–11: San Diego, CA The IPC Designers Council is an interna- tional network of designers. Its mission is to promote printed circuit board design as a pro- fession and to encourage, facilitate, and pro- mote the exchange of information and inte- gration of new design concepts through com- munications, seminars, workshops, and pro- fessional certification through a network of local chapters. DESIGN007 Stephen Chavez is a member of the IPC Designers Council Executive Board and chairman of the commu- nications subcommittee. To read past columns or contact Chavez, click here. Institute for Microstructure Physics in Halle and Uppsala University in Sweden has now provided a detailed anal- ysis of the magneto-optical response for XUV photons. They combined experiments with ab initio calculations, which take only the types of atoms and their arrange- ment in the material as input information. For the proto- typical magnetic elements iron, cobalt and nickel, they were able to measure the response of these materials to XUV radiation in detail. The scientists find that the observed signals are not simply proportional to the magnetic moment at the respective element, and that this deviation is reproduced in theory when so-called local field effects are taken into account. This new insight now allows to quantitative- ly disentangle signals from different elements in one material. "As most functional magnetic materials are made up from several elements, this understanding is crucial to study such ma- terials, especially when we are interested in the more complex dynamic response when manipu- lating them with laser pulses," emphasizes Felix Willems, the first author of the study. (Source: Forschungsverbund Berlin e. V.) In magnetic materials, a wealth of information can be retrieved by optical spectroscopy where the energy of the individual light particles—photons—promotes inner shell electrons to higher energies. This is because such an approach allows to obtain the magnetic properties separately for the different types of atoms in the magnet- ic material and enables scientists to understand the role and interplay of the different constituents. A team of researchers from the Max Born Institute in Berlin together with researchers from the Max-Planck- Accurate Probing of Magnetism With Light

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