Výsledky vyhledávání - "Ramasubramanian L"

Effects of the rf current and bias field direction on the transition from linear to non-linear gyrotropic dynamics in magnetic vortex structures

Autor: Ramasubramanian, L., Iurchuk, V., Hellwig, O., Deac, A. M.

Publikováno v: arXiv:2209.03701 [cond-mat.mes-hall]: https://arxiv.org/abs/2209.03701

We present a frequency-domain study of the dynamic behavior of a magnetic vortex core within a single Permalloy disk by means of electrical detection and micromagnetic simulations. When exciting the vortex core dynamics in a non-linear regime, the li

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::02a08dc4750f4d718e040c998f50bcf3
https://www.hzdr.de/publications/Publ-34873-1

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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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Akademický článek

Effect of Calcium on the Physical Properties of Stirred Probiotic Yogurt

Autor: Ramasubramanian, L., Restuccia, C., Deeth, H.C.

Publikováno v: In Journal of Dairy Science November 2008 91(11):4164-4175

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Tunable Magnetic Vortex Dynamics in Ion-Implanted Permalloy Disks

Autor: Ramasubramanian, L., Kákay, A., Fowley, C., Yildirim, O., Matthes, P., Sorokin, S., Titova, A., Hilliard, D., Böttger, R., Hübner, R., Gemming, S., Schulz, S. E., Kronast, F., Makarov, D., Faßbender, J., Deac, A. M.

Publikováno v: ACS Applied Materials and Interfaces 12(2020)24, 27812-27818

Nanoscale, low-phase noise, tunable transmitter-receiver links are key for enabling the progress of wireless communi-cation. We demonstrate that vortex-based spin-torque nano-oscillators, which are intrinsically low-noise devices due to their topolog

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::347c8294e7afc39c4530b3267e28320f
https://publica.fraunhofer.de/handle/publica/263977

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Akademický článek

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Akademický článek

326 - Exosomes/EVs: PLACENTAL MESENCHYMAL STEM/STROMAL CELL-DERIVED LIPID RAFT NANOVESICLES: A BIOINSPIRED THERAPEUTIC FOR REGENERATIVE MEDICINE

Autor: Ramasubramanian, L., Jyothi, H., Goldbloom-Helzner, L., Light, B.M., Kumar, P., Farmer, D., Wang, A.

Publikováno v: In Cytotherapy May 2022 24(5) Supplement:S95-S96

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Magnetic vortex dynamics and frequency tunability in Cr-implanted permalloy disks

Autor: Ramasubramanian, L., Kákay, A., Fowley, C., Yildirim, O., Matthes, P., Böttger, R., Lindner, J., Fassbender, J., Gemming, S., Schulz, S. E., Deac, A. M.

Publikováno v: INTERMAG 2018-The IEEE International Magnetics Conference (INTERMAG, 23.-27.04.2018, Singapore, Singapore

The fundamental oscillation mode of magnetic vortices in thin-film elements has recently been proposed for designing spin-torque-driven nano-oscillators [1]. Commercial applications require tuning of the output frequency by external parameters, such

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::6af0703cde0546da927ab14642343e5b
https://www.hzdr.de/publications/Publ-28720-1

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Tuneable vortex dynamics with ion implantation

Autor: Ramasubramanian, L., Kákay, A., Fowley, C., Yildirim, O., Matthes, P., Lindner, J., Deac, A. M.

Publikováno v: 9th JEMS Conference 2018, 03.-07.09.2018, Mainz, Germany

The fundamental oscillation mode of magnetic vortices in thin-film elements has been proposed as working principle for spin-torque-driven nano-oscillators [Nat. Phys., 3:498, 2007]. Commercial applications require tuning of the output frequency by ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::559e17a482d4c3a891fb8f4be715d7bb
https://www.hzdr.de/publications/Publ-28722-1

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Microresonator-ferromagnetic resonance investigation of thermal spin-transfer torque in Co2FeAl/MgO/CoFeB magnetic tunnel junctions

Autor: Cansever, H., Narkowicz, R., Lenz, K., Fowley, C., Ramasubramanian, L., Yildirim, O., Niesen, A., Huebner, T., Reiss, G., Lindner, J., Fassbender, J., Deac, A. M.

Publikováno v: INTERMAG 2018 Singapore, 23.-27.04.2018, Singapore, Singapore

Similar to electrical currents flowing through magnetic multilayers [1,2], thermal gradients applied across the barrier of a magnetic tunnel junction may induce pure spin currents and generate ‘thermal’ spin-transfer torques large enough to induc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::6ba48c1657519abdd875c5850b371b87
https://www.hzdr.de/publications/Publ-27490-1

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Vortex dynamics in disks with tailored magnetisations

Autor: Ramasubramanian, L., Fowley, C., Kákay, A., Yildirim, O., Matthes, P., Böttger, R., Lindner, J., Fassbender, J., Gemming, S., Schulz, S. E., Deac, A. M.

Publikováno v: MMM 2017-62nd Annual Conference on Magnetism and Magnetic Materials, 06.-10.11.2017, Pittsburgh, USA

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::2393c1edd33243f35fb1877964bccc1c
https://www.hzdr.de/publications/Publ-26916-1

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