Výsledky vyhledávání - "Arekapudi, S"

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Domain wall-based spin-Hall nano-oscillators

Autor: Sato, N., Schultheiss, K., Körber, L., Puwenberg, N., Mühl, T., Awad, A. A., Arekapudi, S. S. P. K., Hellwig, O., Fassbender, J., Schultheiss, H.

Publikováno v: Phys. Rev. Lett. 123, 057204 (2019)

In the last decade, two revolutionary concepts in nano magnetism emerged from research for storage technologies and advanced information processing. The first suggests the use of magnetic domain walls (DWs) in ferromagnetic nanowires to permanently s

Externí odkaz: http://arxiv.org/abs/1812.06702

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Combined frequency and time domain measurements on injection-locked, constriction-based spin Hall nano-oscillators

Autor: Hache, T., Weinhold, T., Schultheiss, K., Stigloher, J., Vilsmeier, F., Back, C., Arekapudi, S. S. P. K., Hellwig, O., Fassbender, J., Schultheiss, H.

We demonstrate a combined frequency and time domain investigation of injection-locked, constriction-based spin Hall nano-oscillators by Brillouin light scattering (BLS) and time-resolved magneto-optical Kerr effect (TR-MOKE). This was achieved by app

Externí odkaz: http://arxiv.org/abs/1811.08133

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Controlled and deterministic creation of synthetic antiferromagnetic domains by focused ion beam irradiation

Autor: Samad, F., Hlawacek, G., Arekapudi, S. S. P. K., Xu, X., Koch, L., Lenz, M., Hellwig, O.

Publikováno v: Applied Physics Letters 119(2021), 022409-1-022409-5

We study layered synthetic antiferromagnets (SAFs) with out-of-plane interface anisotropy, where the layer-wise antiferromagnetic (AF) alignment is induced by interlayer exchange coupling (IEC). By applying low energy He+ focused ion beam irradiation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::4ef98e9d8417a9379264cd62ca896e0e
https://www.hzdr.de/publications/Publ-33090-1

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Direct Imaging of Distorted Vortex Structure and Vortex-Antivortex Mediated Vortex Annihilation In Exchange Coupled Ferromagnetic/Antiferromagnetic Disk Structures

Autor: Arekapudi, S. S. P. K., Böhm, B., Ramasubramanian, L., Ganss, F., Heinig, P., Stienen, S., Fowley, C., Lenz, K., Deac, A. M., Albrecht, M., Hellwig, O.

Publikováno v: Physical Review B 103(2021), 014405

Topological spin textures such as skyrmions, merons, and vortices in antiferromagnetic (AFM)/ ferromagnetic (FM) materials are actively explored for utilization in future data storage and signal processing devices. An emergent half-integer spin textu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::0ff5a4505d7e8a03ce90ff3e99b50190
https://www.hzdr.de/publications/Publ-30955-2

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Data publication: Controlled and deterministic creation of synthetic antiferromagnetic domains by focused ion beam irradiation

Autor: Samad, F., Hlawacek, G., Arekapudi, S. S. P. K., Xu, X., Koch, L., Lenz, M., Hellwig, O.

Publikováno v: Publication date: 2021-09-06 Open accessDOI: 10.14278/rodare.1142Versions: 10.14278/rodare.1143License: CC-BY-4.0

This data contains results from magnetometry and magnetic force microscopy from the irradiated synthetic antiferromagnets.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::ff90c04b145a829ee6fd61048f4f7b33
https://www.hzdr.de/publications/Publ-33091-1

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P1915 - Magnetische Streufeld-Struktur, magnonisches Bauelement und Verfahren zur Herstellung einer magnetischen Streufeldstruktur

Autor: Samad, F., Koch, L., Arekapudi, S. S. P. K., Hellwig, O., Schultheiß, H.

Publikováno v: DE102019129203-Offenlegung 29.04.2021

Eine magnetische Struktur (510) weist einen synthetischen antiferromagnetischen Schichtstapel (100) mit senkrechter magnetischer Anisotropie auf. Ein erster und ein zweiter Teilbereich (110, 120) des synthetischen antiferromagnetischen Schichtstapels

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::592fbf71f392fc8e3f56f6c9ea8211f1
https://www.hzdr.de/publications/Publ-32996-1

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Control of magneto-optical properties of cobalt-layers by adsorption of a-helical polyalanine self-assembled monolayers

Autor: Sharma, A., Matthes, P., Soldatov, I., Arekapudi, S. S. P. K., Böhm, B., Lindner, M., Selyshchev, O., Thi, N. H. N., Mehring, M., Tegenkamp, C., Schulz, S. E., Zahn, D. R. T., Paltiel, Y., Hellwig, O., Salvan, G.

Publikováno v: Journal of Materials Chemistry C 8(2020)34, 11822-11829

The adsorption of chiral molecules was recently shown to trigger a change in the magnetisation of mesoscopic magnetic domains in a ferromagnetic underlayer. In this work, we investigated the macroscopic (magneto-)optical response of chemisorbed α-he

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::c7ce7031474cd40665dac78b60706a62
https://publica.fraunhofer.de/handle/publica/265972

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Reconfigurable spin-wave non-reciprocity induced by dipolar interaction in a coupled ferromagnetic bilayer

Autor: Gallardo, R. A., Schneider, T., Chaurasiya, A. K., Oelschlägel, A., Arekapudi, S. S. P. K., Roldáan-Molina, A., Hübner, R., Lenz, K., Barman, A., Fassbender, J., Lindner, J., Hellwig, O., Landeros, P.

Publikováno v: Physical Review Applied 12(2019), 034012

Non-reciprocity of wave phenomena describes the situation where wave dispersion depends on the sign of the wave-vector, i.e., counter-propagating waves exhibit di↵erent wavelengths for the same frequency. Such behavior has been recently observed in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::f28c794346228e97ed64fbbb3e484da4
https://www.hzdr.de/publications/Publ-28349-1

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Magnon auto-oscillation under zero magnetic field

Autor: Nishida, N., Hache, T., Arekapudi, S. S. P. K., Awad, A. A., Hellwig, O., Fassbender, J., Schultheiss, H.

Publikováno v: 9th Joint European Magnetic Conference, 03.-07.09.2018, Mainz, Germany

Magnons are attractive for application in energy efficient information technology, because they propagate without any actual charge currents and they offer high frequencies up to THz range. Here we present a novel scheme for magnon generation using s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::8c3c84a50b6ae7d151f872aa1fc99b22
https://www.hzdr.de/publications/Publ-28122-1

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Ion Irradiation Induced Cobalt/Cobalt Oxide Heterostructures: From Materials to Devices

Autor: Hilliard, D., Yildirim, O., Fowley, C., Arekapudi, S. S. P. K., Cansever, H., Böttger, R., Hlawacek, G., Hellwig, O., Lindner, J., Faßbender, J., Deac, A. M.

Publikováno v: Intermag 2018, 23.-27.04.2018, Marina Bay Sands Convention Center, Singapore
2019 Joint MMM-Intermag Washington DC, 14.-18.01.2019, Washington DC, USA

The demand on high data transfer and storage capacities requires smaller devices to transmit or save data. Forming well-defined ferromagnetic and electrically conducting volumes within a non-magnetic and insulating matrix in the dimensions of several

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::586fbf8c9fd84b5a76e8764566d865ef
https://www.hzdr.de/publications/Publ-27668-1

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