Generation and annihilation time of magnetic droplet solitons

Abstract Magnetic droplet solitons were first predicted to occur in materials with uniaxial magnetic anisotropy due to a long-range attractive interaction between elementary magnetic excitations, magnons. A non-equilibrium magnon population provided by a spin-polarized current in nanocontacts enable...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jinting Hang, Christian Hahn, Nahuel Statuto, Ferran Macià, Andrew D. Kent
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/983f445927e14947b8c9fceaf6099cc4
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:983f445927e14947b8c9fceaf6099cc4
record_format	dspace
spelling	oai:doaj.org-article:983f445927e14947b8c9fceaf6099cc42021-12-02T12:32:48ZGeneration and annihilation time of magnetic droplet solitons10.1038/s41598-018-25134-z2045-2322https://doaj.org/article/983f445927e14947b8c9fceaf6099cc42018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25134-zhttps://doaj.org/toc/2045-2322Abstract Magnetic droplet solitons were first predicted to occur in materials with uniaxial magnetic anisotropy due to a long-range attractive interaction between elementary magnetic excitations, magnons. A non-equilibrium magnon population provided by a spin-polarized current in nanocontacts enables their creation and there is now clear experimental evidence for their formation, including direct images obtained with scanning x-ray transmission microscopy. Interest in magnetic droplets is associated with their unique magnetic dynamics that can lead to new types of high frequency nanometer scale oscillators of interest for information processing, including in neuromorphic computing. However, there are no direct measurements of the time required to nucleate droplet solitons or their lifetime–experiments to date only probe their steady-state characteristics, their response to dc spin-currents. Here we determine the timescales for droplet annihilation and generation using current pulses. Annihilation occurs in a few nanoseconds while generation can take several nanoseconds to a microsecond depending on the pulse amplitude. Micromagnetic simulations show that there is an incubation time for droplet generation that depends sensitively on the initial magnetic state of the nanocontact. An understanding of these processes is essential to utilizing the unique characteristics of magnetic droplet solitons oscillators, including their high frequency, tunable and hysteretic response.Jinting HangChristian HahnNahuel StatutoFerran MaciàAndrew D. KentNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-6 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jinting Hang Christian Hahn Nahuel Statuto Ferran Macià Andrew D. Kent Generation and annihilation time of magnetic droplet solitons
description	Abstract Magnetic droplet solitons were first predicted to occur in materials with uniaxial magnetic anisotropy due to a long-range attractive interaction between elementary magnetic excitations, magnons. A non-equilibrium magnon population provided by a spin-polarized current in nanocontacts enables their creation and there is now clear experimental evidence for their formation, including direct images obtained with scanning x-ray transmission microscopy. Interest in magnetic droplets is associated with their unique magnetic dynamics that can lead to new types of high frequency nanometer scale oscillators of interest for information processing, including in neuromorphic computing. However, there are no direct measurements of the time required to nucleate droplet solitons or their lifetime–experiments to date only probe their steady-state characteristics, their response to dc spin-currents. Here we determine the timescales for droplet annihilation and generation using current pulses. Annihilation occurs in a few nanoseconds while generation can take several nanoseconds to a microsecond depending on the pulse amplitude. Micromagnetic simulations show that there is an incubation time for droplet generation that depends sensitively on the initial magnetic state of the nanocontact. An understanding of these processes is essential to utilizing the unique characteristics of magnetic droplet solitons oscillators, including their high frequency, tunable and hysteretic response.
format	article
author	Jinting Hang Christian Hahn Nahuel Statuto Ferran Macià Andrew D. Kent
author_facet	Jinting Hang Christian Hahn Nahuel Statuto Ferran Macià Andrew D. Kent
author_sort	Jinting Hang
title	Generation and annihilation time of magnetic droplet solitons
title_short	Generation and annihilation time of magnetic droplet solitons
title_full	Generation and annihilation time of magnetic droplet solitons
title_fullStr	Generation and annihilation time of magnetic droplet solitons
title_full_unstemmed	Generation and annihilation time of magnetic droplet solitons
title_sort	generation and annihilation time of magnetic droplet solitons
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/983f445927e14947b8c9fceaf6099cc4
work_keys_str_mv	AT jintinghang generationandannihilationtimeofmagneticdropletsolitons AT christianhahn generationandannihilationtimeofmagneticdropletsolitons AT nahuelstatuto generationandannihilationtimeofmagneticdropletsolitons AT ferranmacia generationandannihilationtimeofmagneticdropletsolitons AT andrewdkent generationandannihilationtimeofmagneticdropletsolitons
_version_	1718393993908191232

Generation and annihilation time of magnetic droplet solitons

Ejemplares similares