Suchergebnisse

The control of the spontaneous formation of nanostructures at the surface of thin films is of strong interest in many different fields, from catalysts to microelectronics, because surface and interfacial properties may be substantially enhanced. Here, we analyze the formation of nickel oxide nanocuboids on top of La2Ni1−xMn1+xO6 double perovskite ferromagnetic thin films, epitaxially grown on SrTiO3 (001) substrates by radio-frequency (RF) magnetron sputtering. We show that, by annealing the films at high temperature under high oxygen partial pressure, the spontaneous segregation of nanocuboids is enhanced. The evolution of the structural and magnetic properties of the films is studied as a function of the annealing treatments at different temperatures. It is shown that the formation of NiOx nanocuboids leads to a nanostructured film surface with regions of locally different electrical transport characteristics. ; We acknowledge financial support from the Spanish Ministry of Science, Innovation and Universities through Severo Ochoa Program (CEX2019-000917-S) and RTI2018-099960-B-I00 (SPINCURIOX) and funding from the European Union's Horizon 2020 research and innovation program under the Marie-Sklodowska-Curie grant agreement No. 645658 (DAFNEOX Project) and FEDER Program. Z.K. acknowledge the support of the Serbian Ministry of Education, Science and Technological Development (III45018). This work has been performed in the framework of the PhD program of the Universitat Autonoma de Barcelona (UAB). ; Peer reviewed

Exile, a global and protean phenomenon, touched about half million Spanish Republican refugees at the end of the 1936-39 War in Spain. Contrary to Mexico's significant sheltering, the USA mainly admitted a select group of intellectuals: notably, Zenobia Camprubí and her partner, the 1956 Nobel Prize for Literature recipient, Juan Ramón Jiménez, University of Maryland (1943-1951), Pedro Salinas (Johns Hopkins Univ.), or women like Carmen Aldecoa, or Carmen de Zulueta, who kept alive the progressive gender and education claims from the Second Spanish Republic (1931-1939) at other schools and universities.Nevertheless, widely supported relief organizations and leftist publications channeled aid for the exiles, and rose antifascist awareness for US intellectuals such as Noam Chomsky. Contributions herein this volume, generated eighty years later at the University of Maryland during an international symposium (2019), throughout a continuing academic interest for this diaspora, will illuminate readers on the depth of Spanish exile studies in the Americas, and some lasting contributions from this significant group of witnesses