IEEE Magnetics Society | Spain Chapter

Co-sponsored by: MTT-SCV (CH06085) Speaker(s): Shilong Pan, Santa Clara, California, Virtual: https://events.vtools.ieee.org/m/261079

On Tuesday, September 14, 2021, IEEE SCV-Photonics Chapter will present a webinar with the title " The Next Generation Video Experiences" by Dr Ajit Ninan (Dolby Laboratories), who will cover several interesting topics and implications to displays and file formats, like how to improve video on three axes, More Pixels, Faster Pixels and Better Pixels? Where do we go? What are the implications for AR/VR and other video experiences? Speaker(s): Dr. Ajit Ninan, Santa Clara, California, United States, Virtual: https://events.vtools.ieee.org/m/284354

This presentation focuses on structure property/relationships in advanced materials, emphasizing multifunctional systems that exhibit multiple functionalities. Such systems are then used as building blocks for the fabrication of various emerging technologies. In particular, nanostructured materials synthesized via the bottom-up approach present an opportunity for future generation low cost manufacturing of devices. We focus in particular on recent developments in solar technologies that aim to address the energy challenge, including third generation photovoltaics, solar hydrogen production, luminescent solar concentrators and other optoelectronic devices. Speaker(s): Federico Rosei, Santa Clara, California, United States, Virtual: https://events.vtools.ieee.org/m/286844

Women in Photonics, Silicon Valley, in collaboration with IEEE Young Professionals (YP) and IEEE Women in Engineering (WIE), Miami section affinity groups are proud to present an event titled: "The Spectrum spanning Quantum Computing to Fashion: Perspectives of a physicist artist!!" We are delighted to have Dr. Kitty Y. M. Yeung as our speaker. She is a physicist, engineer, artist, fashion designer, maker and musician. She currently works as a Sr. Quantum Architect at Microsoft Quantum Systems. She's the producer of Microsoft's quantum learning materials, including the MS Learn quantum modules and the Quantum Learning website; author of comic series Quantum Computing & Some Physics; lecturer at HackadayU and Microsoft Reactor on Quantum Computing. To drive integration between science and art, she also founded a sustainable and STEAM fashion brand, Art by Physicist, and leads the Fashion Hack at Microsoft. Speaker(s): Dr. Kitty Y. M. Yeung, Virtual: https://events.vtools.ieee.org/m/285133

In recent years higher integration of optics with electronics has been proposed using the advantages of silicon photonics. In particular co-packaging of optical engines with Ethernet switch ICs. Within the last year there has been a lot of progress on these co-packaged optical switch designs. This presentation shows the architecture and performance data of a "half optics" 25Tb/s switch system with a linear interface between the optical engine and the switch SERDES as one implementation example. Design considerations and potential implementation issues are addressed. An outlook for future systems is given. Speaker(s): Karl Muth, santa clara, California, United States, Virtual: https://events.vtools.ieee.org/m/312554

In this talk we plan to discuss a novel class of nanoscale devices that address unmet performance demands for applications in data communications. The performance of emerging generations of high-speed, integrated electronic circuits is increasingly dictated by interconnect density and latency as well as by power consumption. To alleviate these limitations, data communications using photons has been deployed, where photonic circuits and devices are integrated on platforms compatible with conventional electronic technologies. Within the dominant platform; namely Si, dielectric waveguides confine light via total internal reflection. This imposes bounds on minimizing device dimensions and density of integration. Those bounds arise due to the diffraction limit and the cross-coupling between neighboring waveguides. Nanoscale Plasmonic waveguides provide the unique ability to confine light within a few 10s of nanometers and allow for near perfect transmission through sharp bends as well as efficient light distribution between orthogonally intersecting junctions. With these structures as a building block, new levels of optoelectronic integration and performance metrics for athermal transceivers with achievable bandwidths of 100s Gbps and detection sensitivity better than -55 dBs, will be overviewed in this talk. In addition, opportunities for the role that 2D materials may pay in propelling these record performance metrics even further will be projected. Speaker(s): Amr Helmy, Virtual: https://events.vtools.ieee.org/m/319139

We are pleased to announce the upcoming "3rd Workshop on Magnetic Nanoparticles and Hyperthermia: Anisotropy and Other Adventures", which will take place in Santiago de Compostela (Spain), at the USC iMATUS research centre, from 19th to 21th April 2023. The third in a series of meetings dedicated to magnetic nanoparticles and hyperthermia, this edition will consist of two days of invited talks, and one day dedicated to tutorials. The tutorials will focus on anisotropy and its central role in heating. The research talks will include specific sessions on local/global heating, its determination, and the role of colloidal evolution. Registration is free until full capacity is reached (60 people). Although the workshop is mainly focused on talks given by specialists, a poster session is also planned. Please note that the the RSC Chemical Nanoscience & Nanotechnology Group will fund two travel grants of £250 each for postgraduate students and early career researchers to support their participation in the workshop. Find Further details of the workshop at https://nanomaheat.net/ David Serantes and Roy Chantrell  

The next online seminar of the Joint Brazil-Spain Seminars in Magnetism and Magnetic Materials series organised by the Club Espanol de Magnetismo (CEMAG) will be given by Prof. Ângela Burlamaqui Klautau on Thursday 8 June at 16:00 (Spain local time). The title and abstract are attached below . Google Meet link is meet.google.com/wji-bfjx-hex Exploring the role of interfacial atomic defects in the skyrmions formation Prof. Ângela Burlamaqui Klautau Faculdade de Física, Universidade Federal do Pará (UFPA), Belém-PA, Brazil. Abstract To achieve next-generation spintronic devices based on the so-called skyrmionics, the classification and analysis of skyrmion-hosting materials and their conditions for the emergence of complex magnetic textures are necessary. Spontaneous room temperature skyrmions in Pd/Co/Pd multilayers have recently been experimentally reported . Interestingly, despite the presence of inversion symmetry, a non-zero Dzyaloshinskii-Moriya interaction (DMI) was measured, potentially explaining the stabilization of these skyrmions at room temperature, along with a large perpendicular magnetic anisotropy (PMA). Here, using a multiscale theoretical approach that combines ab-initio electronic structure calculations and state-of-the-art atomistic spin dynamics simulations , we present an investigation of Pd/Co/Pd multilayers with a focus on the magnetic configuration obtained using the Heisenberg exchange and Dzyaloshinskii-Moriya interactions, exploring the influence of the DMI on the ground state and at room temperature. We unveil the presence of metastable skyrmionicstates in these nominally symmetric multilayers, attributed to the significant enhancement of DMI strength due to interfacial atomic defects. Notably, these metastable skyrmions emerge without the need for external magnetic fields and remain stable even near room temperature conditions. Our theoretical findings corroborate with magnetic force microscopy and X-ray magnetic circular dichroism measurements, underscoring the potential for fine-tuning DMI intensity through interdiffusion at thin film interfaces . In addition to the well-known skyrmion, another magnetic structure of interest is the skyrmionium, composed of two skyrmions with opposite winding numbers, resulting in a total zero topological charge. This property allows the skyrmioniums to move by the action of a spin-polarized current without any undesirable lateral motion. Here, using the same theoretical methodology , we present a prediction of both stable skyrmions and unusual metastable skyrmioniums in Ni/Irn/Pt(111) ultrathin films (with n = 0, 1, 2) . Fundamental interactions that control these nanostructures are calculated, as well as some of the properties as a function of enhancing the Ir buffer thickness, particularly: size, speed, and stability with the application of external magnetic fields and finite temperatures. References  J. Brandão et al., Observation of magnetic skyrmions in unpatterned symmetric multilayers at room temperature and zero magnetic field. Scientific Reports 2019, 9, 4144.  S. Frota-Pessôa, Phys. Rev. B 46, 14570 (1992).  P. C. Carvalho et al., Complex magnetic Ni/Irn /Pt(111) ultrathin. Phys. Rev. Materials 2021, 5, 124406.  I. P. Miranda, et al., Band filling effects on the emergence of magnetic skyrmions: Pd/Fe and Pd/Co bilayers on Ir(111). Phys. Rev. B 2022, 105, 224413.  B. Skubic et al., J. Phys. Cond. Matt. 20, 315203 (2008).  P. C. Carvalho et al., Correlation of interface interdiffusion and skyrmionic phases. Accepted to Nano Letters (https://doi.org/10.1021/acs.nanolett.3c00428).