0000000000957992

AUTHOR

Radu Abrudan

showing 3 related works from this author

Direct Imaging of Chiral Domain Walls and Néel‐Type Skyrmionium in Ferrimagnetic Alloys

2021

International audience; The evolution of chiral spin structures is studied in ferrimagnet Ta/Ir/Fe/GdFeCo/Pt multilayers as a function of temperature using scanning electron microscopy with polarization analysis (SEMPA). The GdFeCo ferrimagnet exhibits pure right-hand Néel-type domain wall (DW) spin textures over a large temperature range. This indicates the presence of a negative Dzyaloshinskii-Moriya interaction (DMI) that can originate from both the top Fe/Pt and the Co/Pt interfaces. From measurements of the DW width, as well as complementary magnetic characterization, the exchange stiffness as a function of temperature is ascertained. The exchange stiffness is surprisingly mostly const…

Materials scienceSpintronicsCondensed matter physics530 PhysicsSkyrmionDirect imaging02 engineering and technologyType (model theory)021001 nanoscience & nanotechnologyCondensed Matter Physics530 Physik01 natural sciences[PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Electronic Optical and Magnetic MaterialsDomain (software engineering)BiomaterialsFerrimagnetism0103 physical sciencesElectrochemistry[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]chirals ; Neel domain walls ; skyrmioniums ; skyrmions spintronics010306 general physics0210 nano-technologyAdvanced Functional Materials
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Manipulation of antiferromagnetic domain distribution in Mn2 Au by ultrahigh magnetic fields and by strain

2017

Evidence for a spin reorientation in antiferromagnetic (AFM) Mn2Au thin films induced by high magnetic fields as well as by the application of in-plane mechanical stress is provided. The AFM domain population in the samples was investigated by resonant X-ray Magnetic Linear Dichroism (XMLD) measurements at the L3 edge of Mn using a variable linear polarization of the incident photon beam. As grown samples show no XMLD signal due to averaging over a random AFM domain distribution. After the exposure to a 70 T in-plane magnetic field a clear XMLD signal indicating the generation of a preferential AFM domain orientation is obtained. The same type of XMLD signal is observed when the thin films …

education.field_of_studyMaterials scienceCondensed matter physicsLinear polarizationPopulation02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsLinear dichroism01 natural sciencesMagnetic fieldStress (mechanics)0103 physical sciencesAntiferromagnetismCondensed Matter::Strongly Correlated ElectronsGeneral Materials ScienceThin film010306 general physics0210 nano-technologyeducationSpin (physics)physica status solidi (RRL) - Rapid Research Letters
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Direct imaging of chiral domain walls and N\'eel-type skyrmionium in ferrimagnetic alloys

2021

The evolution of chiral spin structures is studied in ferrimagnet Ta/Ir/Fe/GdFeCo/Pt multilayers as a function of temperature using scanning electron microscopy with polarization analysis (SEMPA). The GdFeCo ferrimagnet exhibits pure right-hand N\'eel-type domain wall (DW) spin textures over a large temperature range. This indicates the presence of a negative Dzyaloshinskii-Moriya interaction (DMI) that can originate from both the top Fe/Pt and the Co/Pt interfaces. From measurements of the DW width, as well as complementary magnetic characterization, the exchange stiffness as a function of temperature is ascertained. The exchange stiffness is surprisingly mostly constant, which is explaine…

Condensed Matter - Materials Science
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