English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/121833
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

DC FieldValueLanguage
dc.contributor.authorRodríguez, Luis A.es_ES
dc.contributor.authorMarín, Lorenaes_ES
dc.contributor.authorMagen, Cesares_ES
dc.contributor.authorLucas, I.es_ES
dc.contributor.authorAlgarabel, Pedro A.es_ES
dc.contributor.authorMorellón, Luises_ES
dc.contributor.authorSnoeck, E.es_ES
dc.contributor.authorTeresa, José María dees_ES
dc.contributor.authorIbarra, M. Ricardoes_ES
dc.identifier.citationEMC 2012es_ES
dc.descriptionResumen del póster presentado al: "15th European Microscopy Congress" celebrado en Manchester (UK) del 16 al 21 de septiembre de 2012.es_ES
dc.description.abstractProgress in nanofabrication of nanomaterials is pushing the scientific community to search for and develop new tools to measure physical properties at the nanoscale. In the case of magnetic nanomaterials, the measurement of the magnetic properties of individual nanomagnets is of the utmost importance to understand the magnetization processes underway and to correlate the local magnetic behavior with the macroscopic properties expected to lead to new technological applications. Spintronics is a very active area in magnetism for the development of magnetic nanostructures for devices, such as magnetic tunnel junctions (MTJs). Though great advances have been done on the magnetic and magnetotransport macroscopic behavior of MTJs, a great physical insight would be gained by direct visualization of magnetization switching processes with nanometer resolution. High spatial resolution techniques are required for local characterization of magnetization processes in nanostructures. Transmission Electron Microscopy (TEM) techniques such as Electron Holography (EH) allows the quantitative imaging of the magnetization configurations of ferromagnetic (FM) materials with unprecedented nanometer spatial resolution. Furthermore, EH can be combined with in situ TEM experiments applying external constraints such as magnetic and electric fields, temperature, etc. In this work, we use a TEM cryo-holder to image by EH the magnetization states of FM materials whose Curie temperature (TC) is below room temperature while varying in situ an external magnetic field applied on the thin sample We will present the EH study of the magnetization switching of LaxCa1-xMnO3 (LCMO) and LaxSr1-xMnO3 (LSMO) based thin film MTJs (whose TC = 180 and 300 K, respectively) as a function of the temperature and magnetic field applied thanks to the objective lens. The interlayer coupling/decoupling of magnetic electrodes in MTJs will be analyzed by performing hysteresis loops at 100 K, mapping the magnetic configurations of the two FM electrodes. This allows both the switching fields and the magnetization reversal processes to be studied as a function of the multilayer structure and composition. Different strategies to subtract the contribution of the mean inner potential to the total phase shift will be explored in order to optimize the process of magnetic phase retrieval in such cryo-EH conditions.es_ES
dc.subjectElectron holographyes_ES
dc.subjectCryo TEMes_ES
dc.titleMagnetization switching of manganite-based thin film heterostructures studied by Cryo Electron Holographyes_ES
dc.typepóster de congresoes_ES
dc.description.peerreviewedPeer reviewedes_ES
Appears in Collections:(ICMA) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show simple item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.