INESC MN and Instituto Superior Tecnico Lisboa
Susana Cardoso de Freitas received the Ph.D. degree in Physics by the Instituto Superior Técnico, Universidade de Lisboa and INESC–MN in 2002. In 2002 she was a Co-Op Pre-Professional Engineer at the IBM T. J. Watson Research Center (USA), and then became a researcher at INESC-MN, where she is currently the leader of the Spintronics and Magnetic Biosensors Group. She has extensive experience as principal researcher in collaborative projects developing advanced materials, sensors, and integrated systems. In 2018 she was selected as one of 100 Portuguese “Women in Science”.
Magnetic field sensors - in particular, magnetoresistive MR sensors, were driven by the technological push from computers and information storage in the early 1990’s. Presently they have a mature and transversal level of implementation in the market, from automotive to biomedical domains. In this talk, I will first introduce key concepts in spintronics and highlight the physics mechanisms defining the sensor performance and the figures of merit for the classification of an outstanding MR sensor. The impressive technological progress in thin film preparation and characterization, combined with nano-microfabrication tools offer presently large spectra for device design.In addition, the noise mechanisms (the “killing factor” that limits the MR sensor performance) will be discussed, and I will show successful strategies for improving the signal-to-noise ratio, improving the ultimate field detectable by an MR sensor.
联系人：胡 颖（8264 9361）