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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nowak, Ulrich
University of Konstanz
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Identifying the Origin of Thermal Modulation of Exchange Bias in MnPS 3 /Fe 3 GeTe 2 van der Waals Heterostructurescitations
- 2024All-optical switching in Cr- and Mn-doped L1 0 FePt thin filmscitations
- 2024Identifying the Origin of Thermal Modulation of Exchange Bias in MnPS<sub>3</sub>/Fe<sub>3</sub>GeTe<sub>2</sub> van der Waals Heterostructurescitations
- 2021Exceptional sign changes of the nonlocal spin Seebeck effect in antiferromagnetic hematitecitations
- 2020L1 0 -ordered (Fe 100−x Cr x )Pt thin films : Phase formation, morphology, and spin structurecitations
- 2020Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents: Competition of angular momentum transfer and entropic torque
- 2020L10-ordered (Fe100−xCrx)Pt thin films: Phase formation, morphology, and spin structurecitations
- 2020Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents : competition of angular momentum transfer and entropic torquecitations
- 2019Thermal skyrmion diffusion used in a reshuffler devicecitations
- 2019Thermal skyrmion diffusion used in a reshuffler device
- 2018Induced versus intrinsic magnetic moments in ultrafast magnetization dynamicscitations
- 2017Development of antiferromagnetic Heusler alloys for the replacement of iridium as a critically raw materialcitations
- 2017Development of antiferromagnetic Heusler alloys for the replacement of iridium as a critically raw materialcitations
- 2017Magnetization compensation and spin reorientation transition in ferrimagnetic DyCo 5 : Multiscale modeling and element-specific measurementscitations
- 2017Direct observation of enhanced magnetism in individual size- and shape-selected 3d transition metal nanoparticlescitations
- 2017Development of Antiferromagnetic Heusler Alloys for the Replacement of Iridium as a Critically Raw Material
- 2014Direct observation of magnetic metastability in individual iron nanoparticlescitations
- 2013Switching modes in easy and hard axis magnetic reversal in a self-assembled antidot arraycitations
- 2012Temperature dependence of the frequencies and effective damping parameters of ferrimagnetic resonancecitations
- 2012Theoretical study of magnetic domain walls through a cobalt nanocontactcitations
- 2012All-optical magnetization reversal by circularly-polarized laser pulses : Experiment and multiscale modelingcitations
- 2007Spin configuration of ferromagnetic/antiferromagnetic nano-composite particlescitations
- 2005Domain wall resistance in (Co/Pt)10-nanowirescitations
- 2002Magnetization reversal process in thin Co nanowirescitations
Places of action
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article
L10-ordered (Fe100−xCrx)Pt thin films: Phase formation, morphology, and spin structure
Abstract
<p>Chemically ordered L10 (Fe100-xCrx)Pt thin films were expitaxially grown on MgO(001) substrates by magnetron sputter-deposition at 770C. In this sample series, Fe was continuously substituted by Cr over the full composition range. The lattice parameter in the [001] growth direction steadily increases from L10-FePt toward L10-CrPt, confirming the incorporation of Cr in the lattice occupying Fe sites. With the observed high degree of chemical ordering and (001) orientation, strong perpendicular magnetic anisotropy is associated, which persists up to a Cr content of x=20 at. %. Similarly, the coercive field in the easy-axis direction is strongly reduced, which is, however, further attributed to a strong alteration of the film morphology with Cr substitution. The latter changes from a well-separated island microstructure to a more continuous film morphology. In the dilute alloy with low Cr content, isolated Cr magnetic moments couple antiferromagnetically to the ferromagnetic Fe matrix. In this case, all Cr moments are aligned parallel, thus forming a ferrimagnetic FeCrPt system. With increasing Cr concentration, nearest-neighbor Cr-Cr pairs start to appear, thereby increasing magnetic frustration and disorder, which lead to canting of neighboring magnetic moments, as revealed by atomistic spin-model simulations with model parameters based on first principles. At higher Cr concentrations, a frustrated ferrimagnetic order is established. With Cr substitution of up to 20 at. %, no pronounced change in Curie temperature, which is in the range of 700 K, was noticed. But with further addition the Curie temperature drops down substantially even down to room temperature at 47 at. % Cr. Furthermore, x-ray magnetic circular dichroism studies on dilute alloys containing up to 20 at. % of Cr revealed similar spin moments for Fe and Cr in the range between 2.1-2.5 µB but rather large orbital moments of up to 0.50 ±0.10µB for Cr. These results were also compared to ab initio calculations.</p>