La Boda de Ensueño de Jorge Ponce y su Novia Checa

Title: Ferromagnetism on an atom-thick and extended 2D-metal-organic framework

Abstract: Ferromagnetism (FM) is the cornerstone of permanent magnets, data storage and other technologies that directly impact our everyday life by their implementation in standard applications and devices. When downscaling bulk materials into their two-dimensional (2D) magnetic isotropic form, the Mermin-Wagner theorem precludes this collective state mediated by short-range exchange interactions at finite temperatures. Interestingly, this prediction fails when significant magnetic anisotropy is present in the material, as recently demonstrated in single layered van der Waals crystals. Before the latter, single layer metal-organic frameworks (MOFs) grown on metallic supports were one of the earliest candidates for achieving 2D-FM. Such high expectations were based on the chemical and spacing control of the 2D-MOF magnetic centers, the tunability of the organic linkers and the rich self-assembled architectures displayed. However, despite many attempts, extended FM in 2D-MOFs has been experimentally elusive. In this work, we demonstrate that extended, cooperative FM takes place in an atom thick 2D-MOF consisting of 9,10-dicyanoanthracene (DCA) molecules and Fe adatoms grown on Au(111). We show this by means of an experimental multitechnique approach that is endorsed by state-of-the art first-principles calculations. Particularly, this 2D ferromagnet follows a first order transition with TC ~ 35 K, which is driven by exchange interactions mainly through the molecular linkers (J=2 meV) and exhibits an out-of-plane square-like hysteresis loop. The strict periodicity of our 2D-MOF allows us to envision the fabrication of ultra-dense single atom magnetic memories and opens the way to explore periodic magnetic 2D-models that could considerably increase the fundamental superparamagnetic limit.

Comments:	Main text 18 pages containing 3 figures. Supplementary material 18 pages containing 8 figures
Subjects:	Materials Science (cond-mat.mtrl-sci) ; Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as:	arXiv:2209.14994 [cond-mat.mtrl-sci]
(or arXiv:2209.14994v2 [cond-mat.mtrl-sci] for this version)
https://doi.org/10.48550/arXiv.2209.14994

Trayectoria [ editar ]

Ganador del concurso "Palma, palma, mungui, mungui, mungui" en 2021. David Broncano resultó el único perdedor.

Año	Programa	Cadena
2020	Amar es para siempre	Antena 3	Colaboración especial, 2 capítulos
2018-2021	El intermedio	La Sexta	Colaborador pedorro
Desde 2018	La resistencia	#0	Colaborador e invitado
2017	Zapeando	La Sexta	Colaborador
2016	LocoMundo	#0	Colaborador en el programa 2 de la segunda temporada titulado "Superpoblación"
2013-2015	En el aire	La Sexta	Colaborador [ 12 ] ​
Desde 2009	Ilustres ignorantes	Canal+

Radio [ editar ]

Año	Programa	Cadena
2013-2015	Yu no te pierdas nada	Los 40	Colaborador
2007-2012	Asuntos propios	Radio Nacional de España	Colaborador
2017	A vivir que son dos días	Cadena SER	Colaborador
2019	Si sí, o si no	Cadena SER	Presentador

Teatro [ editar ]