I. Lucas

Ultrafast electron heating as the dominant driving force of photoinduced terahertz spin currents

Reza Rouzegar, Pilar Jiménez-Cavero, Oliver Gueckstock, Mohamed Amine Wahada et autres

Ultrafast spintronics strongly relies on the generation, transport, manipulation and detection of terahertz spin currents (TSCs). In F|HM stacks consisting of a ferromagnetic layer F and a heavy-metal layer HM, ultrafast spin currents are typically triggered by femtosecond optical laser pulses. A …

Magnon-mediated terahertz spin transport in metallic Gd|Pt stacks

Oliver Gueckstock, Tim Amrhein, Beatrice Andres, Pilar Jiménez-Cavero et autres

We study femtosecond spin transport in a Gd|Pt stack induced by a laser pulse. Remarkably, the dynamics of the spin current from Gd to Pt suggests that its dominant driving force is the ultrafast spin Seebeck effect. As the contribution of a …

Polymer assisted deposition of YIG thin films with thickness control for spintronics applications

Rubén Corcuera, Pilar Jiménez-Cavero, Rafael Perez del Real, F. Rivadulla et autres

The use of magnetic garnets in new technologies such as spintronic devices requires fine-structured thin films. Classical fabrication techniques for these materials, typically physical vapor deposition methods, lead to excellent magnetic behavior. However, availability and scalability for potential applications are well restricted. …

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Spin Glass State in Strained La2/3Ca1/3MnO3 Thin Films

I. Lucas, N. Marcano, Thomas Prokscha, César Magén et autres

Epitaxial strain modifies the physical properties of thin films deposited on single-crystal substrates. In a previous work, we demonstrated that in the case of La2/3Ca1/3MnO3 thin films the strain induced by the substrate can produce the segregation of a non-ferromagnetic layer (NFL) …

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Electrodeposited Magnetic Nanowires with Radial Modulation of Composition

Claudia Fernández‐González, Alejandra Guedeja‐Marrón, Beatriz L. Rodilla, Ana Arché‐Núñez et autres

In the last few years, magnetic nanowires have gained attention due to their potential implementation as building blocks in spintronics applications and, in particular, in domain-wall- based devices. In these devices, the control of the magnetic properties is a must. Cylindrical magnetic …

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Transition of laser-induced terahertz spin currents from torque- to conduction-electron-mediated transport

Pilar Jiménez-Cavero, Oliver Gueckstock, Lukáš Nádvorník, I. Lucas et autres

Spin transport is crucial for future spintronic devices operating at bandwidths up to the terahertz range. In F|N thin-film stacks made of a ferromagnetic/ferrimagnetic layer $F$ and a normal-metal layer $N$, spin transport is mediated by (1) spin-polarized conduction electrons and/or (2) …

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Tuning Coherent-Phonon Heat Transport in LaCoO$_3$/SrTiO$_3$ Superlattices

D. Bugallo, E. Langenberg, E. Carbó-Argibay, Noa Varela‐Domínguez et autres

Accessing the regime of coherent phonon propagation in nanostructures opens enormous possibilities to control the thermal conductivity in energy harvesting devices, phononic circuits, etc. In this paper we show that coherent phonons contribute substantially to the thermal conductivity of LaCoO3/SrTiO3 oxide superlattices, …

Tuning laser-induced terahertz spin currents from torque- to conduction-electron-mediated transport

Pilar Jiménez-Cavero, Oliver Gueckstock, Lukáš Nádvorník, I. Lucas et autres

Spin transport is crucial for future spintronic devices operating at bandwidths up to the terahertz (THz) range. In F|N thin-film stacks made of a ferro/ferrimagnetic layer F and a normal-metal layer N, spin transport is mediated by (1) spin-polarized conduction electrons and/or …

Optimization of YIG/Bi stacks for spin-to-charge conversion and influence of aging

Soraya Sangiao, José Ignacio Morales-Aragones, I. Lucas, Pilar Jiménez-Cavero et autres

Abstract We show that an optimized growth of magnetic layer/non-magnetic layer stacks allows for the improvement of the spin-to-charge conversion efficiency. From the analysis of the voltage signal generated in spin pumping experiments due to the inverse spin Hall effect (ISHE) on …

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Strong Crystallographic Influence on Spin Hall Mechanism in PLD-Grown IrO2 Thin Films

Pilar Jiménez-Cavero, I. Lucas, Jorge Ara-Arteaga, Manuel Ricardo Ibarra et autres

Spin-to-charge conversion is a central process in the emerging field of spintronics. One of its main applications is the electrical detection of spin currents, and for this, the inverse spin Hall effect (ISHE) has become one of the preferred methods. We studied …

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Engineering the spin conversion in graphene monolayer epitaxial structures

Alberto Anadón, Adrián Gudín, R. Guerrero, Icíar Arnay et autres

Spin Hall and Rashba–Edelstein effects, which are spin-to-charge conversion phenomena due to spin–orbit coupling (SOC), are attracting increasing interest as pathways to manage rapidly and at low consumption cost the storage and processing of a large amount of data in spintronic devices …

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Quantification of the interfacial and bulk contributions to the longitudinal spin Seebeck effect

Pilar Jiménez-Cavero, I. Lucas, David Bugallo, Carlos López‐Bueno et autres

We report the disentanglement of bulk and interfacial contributions to the thermally excited magnon spin current in the spin Seebeck effect under static heating. For this purpose, we have studied the dependence of the inverse spin Hall voltage and the thermal conductivity …

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