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Droplet solitons are coherently precessing solitary waves that have been recently realized in thin ferromagnets with perpendicular anisotropy.In the strongly nonlinear regime, droplets can be well approximated by a slowly precessing,…

Pattern Formation and Solitons · Physics 2013-11-12 Lake Bookman , Mark Hoefer

Spin-transfer torques in a nanocontact to an extended magnetic film can create spin waves that condense to form dissipative droplet solitons. Here we report an experimental study of the temperature dependence of the current and applied…

Mesoscale and Nanoscale Physics · Physics 2017-06-07 Sergi Lendínez , Jinting Hang , Saül Vélez , Joan Manel Hernàndez , Dirk Backes , Andrew D. Kent , Ferran Macià

A spin-polarized current in a nanocontact to a magnetic film can create collective magnetic oscillations by compensating the magnetic damping. In particular, in materials with uniaxial magnetic anisotropy, droplet solitons have been…

Mesoscale and Nanoscale Physics · Physics 2018-12-05 Nahuel Statuto , Joan Manel Hernàndez , Andrew D. Kent , Ferran Macià

Magnetic droplet solitons are dynamical magnetic textures that form due to an attractive interaction between spin waves in thin films with perpendicular magnetic anisotropy. Spin currents and the spin torques associated with these currents…

Mesoscale and Nanoscale Physics · Physics 2020-09-10 Ferran Macià , Andrew D. Kent

Magnetic droplets are nanoscale, non-topological, magnetodynamical solitons that can be nucleated in spin torque nano-oscillators (STNOs) or spin Hall nano-oscillators (SHNOs). All theoretical, numerical, and experimental droplet studies…

Mesoscale and Nanoscale Physics · Physics 2023-04-13 Sheng Jiang , Sunjae Chung , Martina Ahlberg , Anreas Frisk , Q. Tuan Le , Hamid Mazraati , Afshin Houshang , Olle Heinonen , Johan Åkerman

The magnetic droplet soliton is a large amplitude, coherently precessing wave state that exists in ferromagnetic thin films with perpendicular magnetic anisotropy. To effectively sustain a droplet, magnetic damping can be locally…

Pattern Formation and Solitons · Physics 2019-07-10 Richard O. Moore , Mark A. Hoefer

The magnetic dissipative droplet is a strongly nonlinear wave structure that can be stabilized in a thin film ferromagnet exhibiting perpendicular magnetic anisotropy by use of spin transfer torque. These structures have been observed…

Mesoscale and Nanoscale Physics · Physics 2016-04-12 P. Wills , E. Iacocca , M. A. Hoefer

Magnetic droplets are nanoscale, non-topological, dynamical solitons that can be nucleated in different spintronic devices, such as spin torque nano-oscillators (STNOs) and spin Hall nano-oscillators (SHNOs). This chapter first briefly…

Mesoscale and Nanoscale Physics · Physics 2024-11-12 Martina Ahlberg , Sheng Jiang , Roman Khymyn , Sunjae Chung , Johan Åkerman

Magnetic droplets are dynamical solitons that can be generated by locally suppressing the dynamical damping in magnetic films with perpendicular anisotropy. To date, droplets have been observed only in nanocontact spin-torque oscillators…

Mesoscale and Nanoscale Physics · Physics 2017-12-18 B. Divinskiy , S. Urazhdin , V. E. Demidov , A. Kozhanov , A. P. Nosov , A. B. Rinkevich , S. O. Demokritov

Magnetic droplets are non-topological dynamical solitons that can be nucleated and sustained in nano-contact based spin torque nano-oscillators (NC-STNOs) with perpendicular anisotropy free layers. While originally predicted in…

The inertial effects of magnetic solitons play a crucial role in their dynamics and stability. Yet governing their inertial effects is a challenge for their use in real devices. Here, we show how to control the inertial effects of magnetic…

Mesoscale and Nanoscale Physics · Physics 2020-02-05 M. Mohseni , D. R. Rodrigues , M. Saghafi , S. Chung , M. Ahlberg , H. F. Yazdi , Q. Wang , S. A. H. Banouazizi , P. Pirro , J. Åkerman , M. Mohseni

Magnetic droplet solitons are non-linear dynamical modes that can be excited in a thin film with perpendicular magnetic anisotropy with a spin-transfer-torque. Although droplet solitons have been proved to be stable with a hysteretic…

Mesoscale and Nanoscale Physics · Physics 2015-12-09 Sergi Lendínez , Nahuel Statuto , Dirk Backes , Andrew D. Kent , Ferran Macià

Magnetic droplets, a class of highly non-linear magnetodynamical solitons, can be nucleated and stabilized in nanocontact spin-torque nano-oscillators where they greatly increase the microwave output power. Here, we experimentally…

Droplet solitons are a strongly nonlinear, inherently dynamic structure in the magnetization of ferromagnets, balancing dispersion (exchange energy) with focusing nonlinearity (strong perpendicular anisotropy). Large droplet solitons have…

Pattern Formation and Solitons · Physics 2015-06-29 L. D. Bookman , M. A. Hoefer

Magnetic dissipative droplets are localized, strongly nonlinear dynamical modes excited in nano-contact spin valves with perpendicular magnetic anisotropy. These modes find potential application in nanoscale structures for magnetic storage…

Mesoscale and Nanoscale Physics · Physics 2015-06-17 Ezio Iacocca , Randy K. Dumas , Lake Bookman , Majid Mohseni , Sunjae Chung , Mark A. Hoefer , Johan Åkerman

Magnetic thin films with perpendicular magnetic anisotropy (PMA) have localized excitations that correspond to reversed dynamically precessing magnetic moments, known as magnetic droplet solitons. Fundamentally, these excitations are…

Materials Science · Physics 2015-04-08 Ferran Macià , Dirk Backes , Andrew D. Kent

Magnetic droplet soliton is a localized dynamic spin state which can serve as a nanoscale information carrier and nonlinear oscillator. The present opinion is that the formation of droplet solitons requires the compensation of magnetic…

Materials Science · Physics 2022-09-07 Andrei I. Nikitchenko , Nikolay A. Pertsev

The behavior of a microdrop of dielectric liquid suspended in a magnetic fluid and exposed to the action of electric and magnetic fields is studied experimentally. With increasing electric field, the deformation of droplets into oblate…

Soft Condensed Matter · Physics 2012-03-27 Arthur Zakinyan , Elena Tkacheva , Yury Dikansky

We show by means of micromagnetic simulations that spin polarizer in nano-contact spin torque oscillators (NC-STOs) as the representative of the fixed layer in an orthogonal pseudo-spin valve (P-SV) can be employed to design and to control…

Mesoscale and Nanoscale Physics · Physics 2018-02-12 Morteza Mohseni , Majid Mohseni

A novel type of solitary wave is predicted to form in spin torque oscillators when the free layer has a sufficiently large perpendicular anisotropy. In this structure, which is a dissipative version of the conservative droplet soliton…

Materials Science · Physics 2010-09-01 M. A. Hoefer , T. J. Silva , Mark W. Keller
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