BCMaterials Fortnightly Seminars #28

"Magnetically Tunable RF and Microwave Polymer Nanocomposite Materials"
KRISTEN STOJAK
(University of South Florida)
We have fabricated and studied a class of polymer nanocomposite (PNC) materials incorporating magnetic nanoparticles into various polymers. There has been much interest in these magnetic PNCs due to potential applications for EMI shielding, tunable electromagnetic devices and flexible electronics. The resonance frequency can be tuned in these PNCs in the presence of an externally applied magnetic field, via the inversely proportional relationship between the resonance frequency and the product of relative permittivity (εr) and permeability (μr). As the frequency is swept, εr of a dielectric material changes and as the magnetic field is swept, μr of a magnetic material changes.
“Fabrication and Study of Static and Dynamic Characteristics of Metal-Ferroelectric-Metal Nanoscale Film Capacitor Structures”
HOVHANDA DASHTOYAN
(National Polytechnic University of Armenia)
In order to meet the strict requirements of modern information systems materials and structures with new and improved features are needed. In this regard the structures based on ferroelectrics (FEs) have a great potential. Interest in FE thin films has been considerable over the last 20 years, driven by the possibility of using them for non-volatile memory applications and new microelectromechanical systems (MEMS), FE FETs, photosensitive bio-medical sensors, solid-oxide fuel cell (SOFC) electrodes, voltage-tunable capacitors, microwave electronic components, Film Bulk Acoustic Wave Resonators [1-3], etc. We have already investigated methods of fabrication of FE based (Ba0.25Sr0.75TiO3, Ba0.31Sr0.69TiO3, ZnO) nanoscale film capacitor structures [4, 5], their dark and photo J(V), I(V) characteristics, charge transport and conduction mechanisms in FE thin films, etc. in the framework of my PhD thesis. In the framework of ERASMUS MUNDUS BACKIS grant program at the UPV/EHU it is planned to fabricate diverse FE based thin film capacitor structures (mainly metal-ferroelectric-metal) and develop the efficient technologies of fabrication, experimentally investigate different static and dynamic characteristics of fabricated structures and compare these results with the theory already developed by our research group in the framework of my PhD thesis.Related news
Amaia Zarandona, New Doctor of BCMaterials
We would like to congratulate Amaia Zarandona Rodríguez for obtaining her PhDs in Materials Science and Technology from the UPV/EHU. On May 22, Amaia made a brilliant defense of her thesis titled “…Pablo Docampo, New Ikerbasque Professor at BCMaterials
We are glad to welcome Pablo Docampo as new Ikerbasque Research Professor at BCMaterials. Prof. Docampo received his DPhil in 2012 from the University of Oxford focussing on the electronic…Invited Talk with Aaron Mailman (May 20th)
BCMaterials is proud to host Dr. Aaron Mailman, Academy of Finland Research Fellow at the University of Jyväskylä (Finland) in a new invited talk. The talk is titled: “Organic Radicals as Functional…Qi Zhang Appointed Visiting Professor at NUAA (China)
Our Ikerbasque Research Professor, Qi Zhang, was appointed visiting professor at Nanjing University of Aeronautics and Astronautics (NUAA) this April. Zhang, who has an extensive research career in…