Our PhD student Juan Carlos Gonzalez-Rosillo has attended to the 6th Spanish Workshop in Nanolithography meeting (NANOLITO 2014) which was held in Zaragoza at the Instituto de Nanociencia de Aragon facilities. He presented a poster entitled “Resistive Switching phenomena in La1-xSrxMnO3-y compounds: a local probe microscopy study”. The picture is a night view of the Catedral del Pilar in Zaragoza.
http://unizar.es/nanolito/nanolito2014/
On September 8th 2014, the student Jorge Silva from Lisbon (Portugal) arrived to SUMAN group to develop his thesis from his 5-year Integrated Master in Electrical Engineering and Computers (Bachelor (3) + Master (2)), which he is completing in Faculdade de Ciências e Tecnologias from Universidade Nova de Lisboa. This program is mostly known as Erasmus Placement or Erasmus Professional.
He will be working on “Modelling of Superconducting Bulks and Stacks for Electrical Machines Application” under the supervision of Dr. Xavier Granados during the next 6 months.
Welcome Jorge!
J. Lloberas, A. Sumper, M. Sanmarti and X. Granados
Renewable and Sustainable Energy Reviews 38, 404-414 (2014)
DOI: 10.1016/j.rser.2014.05.003
Large synchronous generators with high temperature superconductors are in constant development due to their advantages such as weight and volume reduction and the increased efficiency compared with conventional technologies. The offshore wind turbine market is growing by the day, increasing the capacity and energy production of the wind farms installed and increasing the electrical power for the electrical generators installed, consequently raising the total volume and weight for the electrical generators installed. The HTS synchronous generators (HTSSG) are an alternative to consider due to their low dimensions and low weight per megawatt. This article presents a detailed review of the geometric configurations of the large HTSSG for offshore wind energy followed by an explanation of the main non-conventional technological parts. Additionally, the experience from the most important projects – both ongoing and completed – by companies and research institutes related to the design and construction of HTSSG for offshore wind energy is reviewed.
Zilian Li from China, after obtaining his master’s degree of Materials Science in University of Science and Technology of Beijing, joined SUMAN group to start his PhD thesis on “Fast growth of nanostructured coated conductors from chemical solutions” under the supervision of Dr. Mariona Coll and Prof. Xavier Obradors. Welcome Ziliang!
Jose Antonio Peña, student on the last year of Nanoscience and Nanotechnology degree (UAB), has joined SUMAN group to do the final year degree project on “Growth of YBCO layers on CZO buffered substrates” under the supervision of Dr. Cornelia Pop.
Welcome Jose Antonio!
M. Coll, J. J. Montero, J. Gazquez, K. Nielsch, X. Obradors and T. Puig
Advanced Functional Materials, 24, 5368-5374 (2014)
DOI: 10.1002/adfm.201400517
In this work heteroepitaxial stabilization with nanoscale control of the magnetic Co2FeO4phase at 250 °C is reported. Ultrasmooth and pure Co2FeO4 thin films (5–25 nm) with no phase segregation are obtained on perovskite SrTiO3 single crystal (100) and (110) oriented substrates by atomic layer deposition (ALD). High resolution structural and chemical analyses confirm the formation of the Co-rich spinel metastable phase. The magneto-crystalline anisotropy of the Co2FeO4 phase is not modified by stress anisotropy because the films are fully relaxed. Additionally, high coervice fields, 15 kOe, and high saturation of magnetization, 3.3 μB per formula unit (at 10 K), are preserved down to 10 nm. Therefore, the properties of the ALD-Co2FeO4 films offer many possibilities for future applications in sensors, actuators, microelectronics, and spintronics. In addition, these results are promising for the use of ALD compared to the existing thin-film deposition techniques to stabilize epitaxial multicomponent materials with nanoscale control on a wide variety of substrates for which the processing temperature is a major drawback.
From 21st to 27th of July, Dr. Anna Palau visited the synchrotron radiation source BESSY II at Helmholtz Zentrum Berlin to perform X-PEEM space resolved magnetic measurements in hybrid superconductor-magnetic systems.
