Nanomagnetismus a spintronika

 

Recent Submissions

  • Preserving Metamagnetism in Self-Assembled FeRh Nanomagnets 

    Motyčková, Lucie; Arregi Uribeetxebarria, Jon Ander; Staňo, Michal; Průša, Stanislav; Částková, Klára; Uhlíř, Vojtěch (AMER CHEMICAL SOC, 2023-02-15)
    Preparing and exploiting phase-change materials in the nanoscale form is an ongoing challenge for advanced material research. A common lasting obstacle is preserving the desired functionality present in the bulk form. Here, ...

  • Magnetic-field-controlled growth of magnetoelastic phase domains in FeRh 

    Arregi Uribeetxebarria, Jon Ander; Ringe, Friederike; Hajduček, Jan; Gomonay, Olena; Molnár, Tomáš; Jaskowiec, Jiří; Uhlíř, Vojtěch (IOP Publishing, 2023-06-01)
    Magnetic phase transition materials are relevant building blocks for developing green technologies such as magnetocaloric devices for solid-state refrigeration. Their integration into applications requires a good understanding ...

  • Observing high-k magnons with Mie-resonance-enhanced Brillouin light scattering 

    Wojewoda, Ondřej; Ligmajer, Filip; Hrtoň, Martin; Klíma, Jan; Dhankhar, Meena; Davídková, Kristýna; Staňo, Michal; Holobrádek, Jakub; Krčma, Jakub; Zlámal, Jakub; Šikola, Tomáš; Urbánek, Michal (Springer Nature, 2023-05-09)
    It is of fundamental interest to probe dynamics excitations such as magnons with nanoscale wavelengths in matter. Here, the authors experimentally observe magnons with high k-vectors using Brillouin light scattering ...

  • Subpicosecond metamagnetic phase transition in FeRh driven by non-equilibrium electron dynamics 

    Pressacco, Frederico; Sangalli, Davide; Uhlíř, Vojtěch; Kutnyakhov, Dmytro; Arregi Uribeetxebarria, Jon Ander; Agustsson, Steinn Ymir; Brenner, Günter; Redlin, Harald; Heber, Michael; Vasilyev, Dmitry; Demsar, Jure; Schönhense, Gerd; Gatti, Matteo; Marini, Andrea; Wurth, Wilfried; Sirotti, Fausto (Nature Portfolio, 2021-08-24)
    In FeRh, it is possible to optically drive a phase transition between ferromagnetic (FM) and anti-ferromagnetic (AFM) ordering. Here, using a combination of photoelectron spectroscopy and ab-initio calculations, the authors ...

  • Spin stress contribution to the lattice dynamics of FePt 

    von Reppert, Alexander; Willig, Lisa; Pudell, Jan Etienne; Zeuschner, Steffen Peer; Sellge, Gabriel; Ganss, Fabian; Hellwig, Olaf; Arregi Uribeetxebarria, Jon Ander; Uhlíř, Vojtěch; Crut, Aurelien; Bargheer, Matias (AAAS, 2020-06-01)
    Invar-behavior occurring in many magnetic materials has long been of interest to materials science. Here, we show not only invar behavior of a continuous film of FePt but also even negative thermal expansion of FePt ...

  • Magnetization reversal and confinement effects across the metamagnetic phase transition in mesoscale FeRh structures 

    Arregi Uribeetxebarria, Jon Ander; Horký, Michal; Fabianová, Kateřina; Tolley, Robert; Fullerton, E.E.; Uhlíř, Vojtěch (IOP PUBLISHING LTD, 2018-03-14)
    The effects of mesoscale confinement on the metamagnetic behavior of lithographically patterned FeRh structures are investigated via Kerr microscopy. Combining the temperatureand field-dependent magnetization reversal of ...

  • Research Update: Focused ion beam direct writing of magnetic patterns with controlled structural and magnetic properties 

    Urbánek, Michal; Flajšman, Lukáš; Křižáková, Viola; Gloss, Jonáš; Horký, Michal; Schmid, Michael; Varga, Peter (AIP Publishing, 2018-06-01)
    Focused ion beam irradiation of metastable Fe78Ni22 thin films grown on Cu(100) substrates is used to create ferromagnetic, body-centered cubic patterns embedded into paramagnetic, face-centered-cubic surrounding. The ...

  • Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission 

    Pressacco, Frederico; Uhlíř, Vojtěch; Gatti, Matteo; Nicolaou, Alessandro; Bendounan, Azzedine; Arregi Uribeetxebarria, Jon Ander; Patel, Sheena K. K.; Fullerton, E.E.; Krizmancic, Damjan; Sirotti, F. (AIP Publishing, 2018-05-01)
    We use time-resolved X-ray photoelectron spectroscopy to probe the electronic and magnetization dynamics in FeRh films after ultrafast laser excitations. We present experimental and theoretical results which investigate ...

  • Control of domain structure and magnetization reversal in thick Co/Pt multilayers 

    Fallarino, Lorenzo; Oelschlägel, Antje; Arregi Uribeetxebarria, Jon Ander; Bashkatov, Aleksander; Samad, Fabian; Böhm, B.; Chesnel, Karine; Hellwig, Olav (American Physical Society, 2019-01-25)
    We present a study of the magnetic properties of [Co(3.0 nm)/Pt(0.6nm)]N multilayers as a function of Co/Pt bilayer repetitions N. Magnetometry investigation reveals that samples with N 15 exhibit two characteristic magnetization ...

  • Single-layer graphene on epitaxial FeRh thin films 

    Uhlíř, Vojtěch; Pressacco, Frederico; Arregi Uribeetxebarria, Jon Ander; Procházka, Pavel; Průša, Stanislav; Potoček, Michal; Šikola, Tomáš; Čechal, Jan; Bendounan, Azzedine; Sirotti, F. (ELSEVIER, 2020-06-01)
    Graphene is a 2D material that displays excellent electronic transport properties with prospective applications in many fields. Inducing and controlling magnetism in the graphene layer, for instance by proximity of magnetic ...

  • The growth of metastable fcc Fe78Ni22 thin films on H-Si(100) substrates suitable for focused ion beam direct magnetic patterning 

    Gloss, Jonáš; Horký, Michal; Křižáková, Viola; Flajšman, Lukáš; Schmid, Michael; Urbánek, Michal; Varga, Peter (Elsevier, 2019-03-01)
    We have studied the growth of metastable face-centered-cubic, non-magnetic Fe78Ni22 thin films on silicon substrates. These films undergo a magnetic (paramagnetic to ferromagnetic) and structural (fcc to bcc) phase ...