Manuel Valvidares
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View article: Trigonal distortion in the Kitaev candidate honeycomb magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>BaCo</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi>AsO</mml:mi></mml:mrow><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Trigonal distortion in the Kitaev candidate honeycomb magnet Open
We conducted x-ray absorption (XAS) and magnetic circular dichroism (XMCD) measurements at the Co L2,3 edges on single crystals of the Kitaev candidate honeycomb lattice compound BaCo2(AsO4)2. The measurements employed the inverse partial …
View article: Low‐Energy, Ultrafast Spin Reorientation at Competing Hybrid Interfaces with Tunable Operating Temperature
Low‐Energy, Ultrafast Spin Reorientation at Competing Hybrid Interfaces with Tunable Operating Temperature Open
Information can be stored in magnetic materials by encoding with the direction of the magnetic moment. A figure of merit for these systems is the energy needed to rewrite the information by changing the magnetic moment. Organic molecules o…
View article: A Novel Surface-confined Spiral State With The Double Period In The Cubic Chiral Helimagnet Cu$_2$OSeO$_3$
A Novel Surface-confined Spiral State With The Double Period In The Cubic Chiral Helimagnet Cu$_2$OSeO$_3$ Open
The chiral magnetoelectric insulator Cu$_2$OSeO$_3$ hosts a rich and anisotropic magnetic phase diagram that includes helical, conical, field-polarized, tilted conical, and skyrmion lattice phases. Using resonant elastic x-ray scattering (…
View article: One-dimensional CrI3 encapsulated within multi-walled carbon nanotubes
One-dimensional CrI3 encapsulated within multi-walled carbon nanotubes Open
View article: Room-Temperature Magnetoelectric Switching and Magnetoelectric Memory Driven by Gate Voltage
Room-Temperature Magnetoelectric Switching and Magnetoelectric Memory Driven by Gate Voltage Open
Electric-field control of magnetism is one of the most promising routes for developing the energy-efficient magnetoresistive random access memory and spin-logic devices. Of particular interest is the electric-field-induced 180° perpendicul…
View article: Molecular control of Spin Hall and Unidirectional Magnetoresistance in YIG/PtMn
Molecular control of Spin Hall and Unidirectional Magnetoresistance in YIG/PtMn Open
Molecular engineering at metal interfaces has opened new avenues to design functional structures by manipulating charge transfer and hybridization effects.1–9 While earlier studies have mainly focused on controlling the ferromag…
View article: Unusually High Occupation of Co 3d State in Magnetic Weyl Semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>
Unusually High Occupation of Co 3d State in Magnetic Weyl Semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub> Open
The physical properties of magnetic topological materials are strongly influenced by their nontrivial band topology coupled with the magnetic structure. Co3Sn2S2 is a ferromagnetic kagome Weyl semimetal dis…
View article: Substrate Stabilized Charge Transfer Scheme In Coverage Controlled 2D Metal Organic Frameworks
Substrate Stabilized Charge Transfer Scheme In Coverage Controlled 2D Metal Organic Frameworks Open
Recently, 2D metal‐organic frameworks (2D MOFs), characterized by complex charge transfer mechanisms, have emerged as a promising class of networks in the development of advanced materials with tailored electronic and magnetic properties. …
View article: Conformation‐Driven Nickel Redox States and Magnetism in 2D Metal–organic Frameworks
Conformation‐Driven Nickel Redox States and Magnetism in 2D Metal–organic Frameworks Open
2D metal–organic frameworks (2D MOFs) attract considerable attention because of their versatile properties and as potential candidates for single‐atom catalysis, high‐density information storage media or molecular electronics and spintroni…
View article: Single atom coordination in a manganese–cobalt bi-metallic framework on graphene: geometric and electronic structures
Single atom coordination in a manganese–cobalt bi-metallic framework on graphene: geometric and electronic structures Open
Geometric structure and oxidation states can be tuned upon tetra-coordination of single Mn and Co metal atoms within a porphyrin-based network on graphene.
View article: Robust high-spin Fe <sup>2+</sup> centers in 2D TCNQ-based metal–organic frameworks
Robust high-spin Fe <sup>2+</sup> centers in 2D TCNQ-based metal–organic frameworks Open
The coordination bonds within the 2D MOFs, alongside the π-acceptor electron affinity of the TCNQ, stabilize the HS Fe 2+ and minimize the influence of substrates on the magnetic properties of the Fe 2+ centers, highlighting their inherent…
View article: Room-temperature in-plane ferromagnetism in Co-substituted Fe<sub>5</sub>GeTe<sub>2</sub> investigated by magnetic x-ray spectroscopy and microscopy
Room-temperature in-plane ferromagnetism in Co-substituted Fe<sub>5</sub>GeTe<sub>2</sub> investigated by magnetic x-ray spectroscopy and microscopy Open
The exploration of two-dimensional (2D) van der Waals ferromagnets has revealed intriguing magnetic properties with significant potential for spintronics applications. In this study, we examine the magnetic properties of Co-doped Fe 5 GeTe…
View article: Room Temperature Strong Orbital Moments in Perpendicularly Magnetized Magnetic Insulator
Room Temperature Strong Orbital Moments in Perpendicularly Magnetized Magnetic Insulator Open
The balance between the orbital and spin magnetic moments in a magnetic system is the heart of many intriguing phenomena. Here, experimental evidence of a large orbital moment is shown, which competes with its spin counterpart in a ferrima…
View article: Band Structure Engineering in 2D Metal–Organic Frameworks
Band Structure Engineering in 2D Metal–Organic Frameworks Open
The design of 2D metal–organic frameworks (2D MOFs) takes advantage of the combination of the diverse electronic properties of simple organic ligands with different transition metal (TM) centers. The strong directional nature of the coordi…
View article: Ionic Modulation of Ferromagnetic and Proximity‐Induced Magnetization in Co/Pd Heterostructures
Ionic Modulation of Ferromagnetic and Proximity‐Induced Magnetization in Co/Pd Heterostructures Open
Despite the rampant discovery of tunable magnetic properties using magneto‐ionic gating, e.g., magnetic anisotropy, exchange bias, and exchange interactions, there are few studies that give a quantitative understanding of the reversible an…
View article: Evidence of 3$d$-4$f$ antiferromagnetic coupling in strain-tuned PrCo$_{0.5}$Ni$_{0.5}$O$_{3-δ}$ epitaxial films
Evidence of 3$d$-4$f$ antiferromagnetic coupling in strain-tuned PrCo$_{0.5}$Ni$_{0.5}$O$_{3-δ}$ epitaxial films Open
The strong exchange interaction between 3$d$-4$f$ magnetic sublattice in rare-earth perovskites introduces a variety of complex magnetic states hosting fascinating electronic ground states with exotic properties. Especially when it comes t…
View article: Magnetic single wall CrI3 nanotubes encapsulated within multiwall Carbon Nanotubes
Magnetic single wall CrI3 nanotubes encapsulated within multiwall Carbon Nanotubes Open
CrI3 is a layered ferromagnetic insulator that has recently attracted enormous interest as it was the first example of a stand-alone monolayer ferromagnet, paving the way towards the study of two-dimensional magnetic materials and their us…
View article: On‐Surface Synthesis of Organolanthanide Sandwich Complexes
On‐Surface Synthesis of Organolanthanide Sandwich Complexes Open
The synthesis of lanthanide‐based organometallic sandwich compounds is very appealing regarding their potential for single‐molecule magnetism. Here, it is exploited by on‐surface synthesis to design unprecedented lanthanide‐directed organo…
View article: Ferromagnetism on an atom-thick & extended 2D metal-organic coordination network
Ferromagnetism on an atom-thick & extended 2D metal-organic coordination network Open
View article: Spectroscopic Evidence of Kondo-Induced Quasiquartet in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>CeRh</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>As</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:mrow></mml:math>
Spectroscopic Evidence of Kondo-Induced Quasiquartet in Open
CeRh2As2 is a new multiphase superconductor with strong suggestions for an additional itinerant multipolar ordered phase. The modeling of the low-temperature properties of this heavy-fermion compound requires a quartet Ce3+ crystal-field g…
View article: 2D Co‐Directed Metal–Organic Networks Featuring Strong Antiferromagnetism and Perpendicular Anisotropy
2D Co‐Directed Metal–Organic Networks Featuring Strong Antiferromagnetism and Perpendicular Anisotropy Open
Antiferromagnetic spintronics is a rapidly emerging field with the potential to revolutionize the way information is stored and processed. One of the key challenges in this field is the development of novel 2D antiferromagnetic materials. …
View article: Covalency <i>versus</i> magnetic axiality in Nd molecular magnets: Nd-photoluminescence, strong ligand-field, and unprecedented nephelauxetic effect in fullerenes NdM <sub>2</sub> N@C <sub>80</sub> (M = Sc, Lu, Y)
Covalency <i>versus</i> magnetic axiality in Nd molecular magnets: Nd-photoluminescence, strong ligand-field, and unprecedented nephelauxetic effect in fullerenes NdM <sub>2</sub> N@C <sub>80</sub> (M = Sc, Lu, Y) Open
Nd-luminescence in NdM 2 N@C 80 (M = Sc, Lu, Y) reveals the relationship between strain, ligand-field splitting, nephelauxetic effect, and magnetic axiality.
View article: Engineering of perpendicular magnetic anisotropy in half-metallic magnetic Heusler epitaxial thin films
Engineering of perpendicular magnetic anisotropy in half-metallic magnetic Heusler epitaxial thin films Open
International audience
View article: A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality <i>À La Carte</i> (Adv. Funct. Mater. 47/2023)
A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality <i>À La Carte</i> (Adv. Funct. Mater. 47/2023) Open
View article: Inducing Single Spin‐Polarized Flat Bands in Monolayer Graphene (Adv. Mater. 38/2023)
Inducing Single Spin‐Polarized Flat Bands in Monolayer Graphene (Adv. Mater. 38/2023) Open
View article: Spectroscopic evidence of Kondo-induced quasi-quartet in CeRh$_2$As$_2$
Spectroscopic evidence of Kondo-induced quasi-quartet in CeRh$_2$As$_2$ Open
CeRh$_2$As$_2$ is a new multiphase superconductor with strong suggestions for an additional itinerant multipolar ordered phase. The modeling of the low temperature properties of this heavy fermion compound requires a quartet Ce$^{3+}$ crys…
View article: Probing of three-dimensional spin textures in multilayers by field dependent X-ray resonant magnetic scattering
Probing of three-dimensional spin textures in multilayers by field dependent X-ray resonant magnetic scattering Open
View article: Spin‐Polarization Strategy for Enhanced Acidic Oxygen Evolution Activity
Spin‐Polarization Strategy for Enhanced Acidic Oxygen Evolution Activity Open
Spin‐polarization is known as a promising way to promote the anodic oxygen evolution reaction (OER), since the intermediates and products endow spin‐dependent behaviors, yet it is rarely reported for ferromagnetic catalysts toward acidic O…
View article: A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality <i>À La Carte</i>
A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality <i>À La Carte</i> Open
Multi‐metallic multivariate (MTV) rare earth (RE) metal−organic frameworks (MOFs) are of interest for the development of multifunctional materials, however examples with more than three RE cations are rare and obstructed by compositional s…
View article: Spatially Resolving the Magnetic Configuration of Trilayer Submicrometer Disks with Vortex Chiral Asymmetry Using X-Ray Resonant Magnetic Scattering
Spatially Resolving the Magnetic Configuration of Trilayer Submicrometer Disks with Vortex Chiral Asymmetry Using X-Ray Resonant Magnetic Scattering Open
We show that, in the x-ray magnetic resonant scattering (XRMS) of a two-dimensional array of submicron magnets, the collected intensity at each Bragg reflection is correlated to the reflected light from locations of the magnets that have t…