Light Conversion’s Post

🧲 Ensuring Reliability in High-Temperature Superconductors: A Study on Scratch-Induced Delamination in REBCO Tapes 🧲 High-temperature superconductors (HTS) like REBCO-coated tapes (Rare-Earth Barium Copper Oxide) are pivotal in powering modern technology, from energy systems to MRI machines. However, the resilience of these tapes can be jeopardized by tiny surface scratches acquired during manufacturing or handling 🛠️. In recent study of our colleagues at Department of Superconductor at IEE SAS explored how surface scratches affect the structural integrity of REBCO tapes under bending stress. By bending scratched tapes at small radii, we observed that delamination in the REBCO layer is significantly accelerated, especially at diameters below 7 mm. Through SEM imaging, we documented the progression of delamination, showing how such defects lead to reduced critical current—a vital factor in superconductivity ⚡. These findings underscore the importance of maintaining scratch-free surfaces in REBCO tapes for improved reliability. Even minor surface imperfections can weaken performance in high-stress applications, making rigorous quality control essential 🔍. View our SEM images in the study for a closer look at these structural changes. #Superconductors #REBCO #Research #HighTemperatureSuperconductors #Reliability #Innovation #Engineering #SlovakAcademyofSciences Link: https://lnkd.in/eNcQNDjM Authors: R. Ries, D. Hlaváč, M. Solovyov, F. Gömöry

📈 Decoding Soft Magnetic Performance: The Power of Hysteresis Evaluation Hysteresis loops are essential tools for engineers working with soft magnetic materials. This phenomenon, depicting the relationship between applied magnetic field and resulting magnetization, provides valuable insights into a material's performance. ⇨ As highlighted in Mörée et al.'s insightful "Review of Hysteresis Models for Magnetic Materials" (2023), understanding and utilizing these models is crucial for designing high-end soft magnetic components. Among these models, the Phasor model with Complex Permeability stands out. With just two parameters, it allows for efficient characterization and interpretation of core performance. At Cergen GmbH, we leverage this powerful tool extensively in the design and control of our nanocrystalline cores🌻. The Phasor model empowers us to optimize their magnetic properties, leading to superior performance in various applications. ✆ Ready to discuss your specific soft magnetic needs? Contact Cergen GmbH today! Our team of experts is eager to assist you. #nanocrystalline #softmagnetics #powerelectronics #emc #metering

📣 Next announcement for the upcoming VPE/PLM Swiss Symposium 2024! Matteo Bottin, Product Development Engineer EMC at SCHURTER AG, will be presenting on ‘Common Mode choke electromagnetic simulation’. 🧲 In an era where EMI filtering is crucial, this study uses the COMSOL AC/DC Module to simulate the impedance of a common mode choke within a frequency range of 0.01 to 50 MHz. The results are highly sensitive to the relative magnetic permeability μr of the used core material throughout its frequency range. Learn how relative characteristic curves measured in the laboratory are imported as a function of frequency into the material properties and used as an input in the magnetic losses magnetization model. Starting from Magnetic field Physics, the study considers the influence of skin effect, core conductivity, air volume dimensions, winding geometry, electric field, and magnetic permeability, correlated with specific laboratory test measurements. Don’t miss the opportunity to learn about this toroidal choke model, a precursor to simulating a more complex EMI filter model. Kommen Sie am 11. April an unsere Konferenz! 🗓️ #VPEPLMSwissSymposium #EMC #SCHURTER #CommonModeChoke

🌟 Exciting News! 🌟 I'm thrilled to announce that my latest research paper, titled "𝐄𝐩𝐢𝐭𝐚𝐱𝐢𝐚𝐥 𝐠𝐫𝐨𝐰𝐭𝐡 𝐨𝐟 𝐫𝐮𝐭𝐢𝐥𝐞 𝐆𝐞𝐎𝟐 𝐯𝐢𝐚 𝐌𝐎𝐂𝐕𝐃," has been published online in 𝑨𝒑𝒑𝒍𝒊𝒆𝒅 𝑷𝒉𝒚𝒔𝒊𝒄𝒔 𝑳𝒆𝒕𝒕𝒆𝒓𝒔! 🎉 In this work, we explore the epitaxial growth of rutile germanium dioxide (r-GeO2) via MOCVD—a material with a 4.68 eV bandgap, making it comparable to Ga2O3 but with several advantages such as bipolar dopability, higher electron mobility, and thermal conductivity. These properties make r-GeO2 an extremely promising material for future semiconductor applications. I want to extend my heartfelt gratitude to my supervisor, Dr. Kai Fu, and co-supervisor Dr. Mike Scarpulla, for their continuous guidance and support throughout this research. Special thanks to Bobby Duersch for his invaluable contribution to the XRD analysis and Hunter Ellis, for his significant input. Our findings highlight key growth parameters, including the impact of deposition temperature and rotation speed, on improving crystalline quality. This work marks an important step forward in understanding and optimizing r-GeO2 growth, providing valuable insights for its application in advanced semiconductor technologies. #UWBG #ultrawidebandgap_Semiconductors #MOCVD #GeO2 #Epitaxial_growth

✨ Newest Title Story ✨ The Influence of Annealing Temperature on the Interfacial Heat Transfer in Pulsed Laser Deposition-Grown Ga2O3 on #Diamond #Composite Substrates by Lin Gu et al. C 2024, 10(3), 80; https://lnkd.in/dtHXBABg Abstract As devices become more miniaturized and integrated, the heat flux density has increased, highlighting the issue of heat concentration, especially for low thermal conductivity gallium oxide (Ga2O3). This study utilizes diamond composite substrates with an AlN transition layer to assist Ga2O3 in rapid thermal dissipation. All samples were prepared using pulsed laser deposition (PLD) and annealed at 600–1000 °C. The microstructure, surface morphology, vacancy defects, and thermal characteristics of post-annealed Ga2O3 were then thoroughly investigated to determine the mechanism by which annealing temperature influences the heat transfer of heterostructures. The results demonstrate that increasing the annealing temperature can improve the crystallinity of Ga2O3 while also reducing oxygen vacancy defects from 20.6% to 9.9%. As the temperature rises to 1000 °C, the thermal conductivity of Ga2O3 reaches a maximum of 12.25 W/(m·K). However, the interface microstructure has no direct correlation with annealing temperature. At 700 °C, Ga2O3/diamond exhibits a maximum thermal boundary conductance of 127.06 MW/(m2·K). Higher temperatures (>800 °C) cause irregular mixtures to form near the heterointerface, intensifying phonon interface scattering and sharply deteriorating interfacial heat transfer. These findings contribute to a better understanding of the heterointerface thermal transfer influence mechanism and provide theoretical guidance for the thermal management design and physical analysis of Ga2O3-based power devices. Keywords: Ga2O3; #diamond #composite substrates; annealing; interfacial heat transfer

In the ever-evolving landscape of electric motor technology, the advent of radially magnetized multipole ring magnets has emerged as a game-changer. This innovative neodymium magnet not only offers a manufacturing marvel but also unlocks a realm of possibilities for high-performance and precision in motors. This article from Alliance Magnets explores the unique features, advantages, magnetization patterns, anisotropy, and applications of radially magnetized ring magnets, shedding light on their potential to revolutionize the electric motor industry. Read it now in Magnetics Professional Magazine. https://lnkd.in/g4CrgvuA #magnetics, #magnets, #engineering #electricmotors #bldcmotors

Key Takeaways: - Fabrication of high-performance photodetectors, like those using III-N materials, is technologically challenging and expensive - Cost-effective #fabrication routes are essential - The proposed technique of drop-casting enables non-cleanroom fabrication of a hybrid photodetector operating in self-powered mode - Characteristics of the device include:   - High photosensitivity (85%)   - Fast photoresponse (rise time of ~60 ms) and recovery times (fall time of ~267 ms)   - Ultra-sensitive behavior at low light intensity in the #UV region - Integration of #rGO with #GaN technology shows promise for self-powered UV #photodetector applications - Further process optimization could facilitate mass production of #optoelectronic #devices based on similar material systems I'll be back with further updates once we complete 100 citations!

Tm:YAP Tm doped crystals embrace several attractive features that nominate them as the material of choice for solidstate laser sources with emission wavelength of around 2 microns. Yttrium aluminium perovskite YAlO 3 (YAP) is an attractive laser host for thulium due to its natural birefringence combined with good thermal and mechanical properties similar to those of YAG. There is a self-quenching mechanism between the 3H and 3F levels that produces two excitation 4 4 photons in the upper laser level for one absorbed pump photon. This makes the laser potentially very efficient with high quantum efficiency. The emission cross-section of thulium in YAP is twice as high as in YAG and the peak of absorption at 793 nm is suitable for InGaAs diode pumping. The 4 nm wide absorption peak of Tm:YAP is broader compared to Tm:YAG, resulting in better tolerance to pump diode wavelength variations. Tm:YAP can be tuned from 1870 nm up to 2030 nm with the maximum at 1985 nm. Contact sales@crytur-usa.com for more information. #Cryphosphor #Laser #DETECTOR #OPTICS #SCINTILLATION #HiLIGHT #g4s #CRYSTAL #CRYPHOSPHOR #Monocrystalline #TRIKOLOR #beamlight #Sapphit #Microscopy #SENSOR  #ULTRACLEAN #ceramicmaterials #THERMOCOUPLE #CORUNDUMCERAMICS #Crystallineoptical #Sapphit #Sapphittubes #autoradiography #RASPIXdetector #CRYPIXDETECTOR #detectors #Neutrondetector #Scintillationpowders #Particletracking #MicroScintillation #Scintillationapplications #prototypes  #ALPHACAMDETECTOR #scintillation #crystals #Czochralski #detection #Scintillationdetectors #Electron #Microscopy #ElectronMicroscopySolutions #led #lighting #crystal #crytur #energylighting #Cryphosphor #Monocrystalline #Phosphors #luminophore #ledscreen #LASERSCRYPHOSPHOR™ #electronics #Crytur

Dr. Paul Quayle gives exciting outlooks for the future of diamond as a semiconductor material at Ceramics Expo and Thermal Management Expo in #Novi, Michigan. 1. Diamond's growing potential in semiconductor manufacturing lies in producing larger wafers for industrial use, matching high-tech application needs. 2. Diamond material holds the key to thermal management challenges that advanced materials are facing, emphasizing the need for efficient dissipation and reliability during thermal cycling. 3.  Lessons from materials like SiC, GaN, and Sapphire highlight the importance of aligning material properties with device application needs. Cristian Herrera Rodriguez Janny Mach #thermalmanagement #thermal #semiconductors #diamond #manufacturing #advancedmaterials

🌟 Milestone Alert! 🌟 Exciting news: Our 2016 publication in Applied Physics Letters, "Ultrasensitive self-powered large area planar GaN UV-photodetector using reduced graphene oxide electrodes," is at 92 citations! Just a few steps away from hitting 100. 🎉 Grateful to everyone who's been part of this journey (Nisha Prakash, Ph.D., Gaurav Kumar, PhD, Prabir Pal, Manjri Singh, SP Singh, AB, KA). Let's keep pushing boundaries together! It's worth noting that all the pioneering work behind this publication was meticulously conceived and executed at CSIR-NPL, underscoring our unwavering commitment to scientific excellence. DOI: https://lnkd.in/gP_b5iYw Keywords: #countdown, #Semiconductors, #Photodetectors, #Ultravioletlight, #Electrodes, #Epitaxy, #GrapheneOxide, #rGO, #GaN, #UV, #Photoconductivity, #thinfilms, #AcademicAchievement #ResearchImpact #Citations, #appliedphysicsletters, #apl, #CSIR, #CSIRNPL