226 citations · 387 across the 14 of their papers we have counts for
14 papers
Magnetic droplet solitons
Martina Ahlberg, Sheng Jiang, Roman Khymyn +2
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 Ha…
Coexisting and interacting spin torque driven free and reference layer magnetic droplet solitons
Sheng Jiang, Sunjae Chung, Martina Ahlberg +6
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…
Freezing and thawing magnetic droplet solitons
Martina Ahlberg, Sunjae Chung, Sheng Jiang +10
Magnetic droplets are non-topological magnetodynamical solitons displaying a wide range of complex dynamic phenomena with potential for microwave signal generation. Bubbles, on the…
Analysis of the linear relationship between asymmetry and magnetic moment at the M-edge of 3d transition metals
Somnath Jana, R. S. Malik, Yaroslav O. Kvashnin +11
The magneto-optical response of Fe and Ni during ultrafast demagnetization is studied experimentally and theoretically. We have performed pump-probe experiments in the transverse m…
Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions
S. Jiang, M. Ahlberg, S. Chung +4
We demonstrate field and current controlled magnetodynamics in nanocontact spin-torque nano-oscillators (STNOs) based on orthogonal magnetic tunnel junctions (MTJs). We systematica…
Chiral excitations of magnetic droplet solitons driven by their own inertia
M. Mohseni, D. R. Rodrigues, M. Saghafi +7
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. He…
Inhomogeneous magnon scattering during ultrafast demagnetization
R. Knut, E. K. Delczeg-Czirjak, S. Jana +20
NiFe (Py) and Py alloyed with Cu exhibit intriguing ultrafast demagnetization behavior, where the Ni magnetic moment shows a delayed response relative to the Fe, an…
Damping's effect on the magnetodynamics of spin Hall nano-oscillators
Yuli Yin, Philipp Dürrenfeld, Mykola Dvornik +4
We study the impact of spin wave damping () on the auto-oscillation properties of nano-constriction based spin Hall nano-oscillators (SHNOs). The SHNOs are based on a 5 nm Pt la…
Tunable spin pumping in exchange coupled magnetic trilayers
Masoumeh Fazlali, Martina Ahlberg, Mykola Dvornik +1
Magnetic thin films at ferromagnetic resonance (FMR) leak angular momentum, which may be absorbed by adjacent layers. This phenomenon, known as spin pumping, is manifested by an in…
Direct observation of magnetic droplet solitons in all-perpendicular spin torque nano-oscillators
Sunjae Chung, Q. Tuan Le, Martina Ahlberg +11
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 anisot…
Parametric Auto-Excitation of Magnetic Droplet Soliton Perimeter Modes
D. Xiao, V. Tiberkevich, Y. H. Liu +7
Recent experiments performed in current-driven nano-contacts with strong perpendicular anisotropy have shown that spin-transfer torque can drive self-localized spin waves [1, 2] th…
All-Optical Study of Tunable Ultrafast Spin Dynamics in [Co/Pd]-NiFe Systems: The Role of Spin-Twist Structure on Gilbert Damping
Chandrima Banerjee, Semanti Pal, Martina Ahlberg +3
We investigate optically induced ultrafast magnetization dynamics in [Co(0.5 nm)/Pd(1 nm)]x5/NiFe(t) exchange-spring samples with tilted perpendicular magnetic anisotropy using a t…
Interfacial Dzyaloshinskii-Moriya interaction in Pt/CoFeB films: effect of the heavy-metal thickness
S. Tacchi, R. E. Troncoso, M. Ahlberg +4
We report the observation of a Pt layer thickness dependence on the induced interfacial Dzyaloshinskii-Moriya interaction in ultra-thin Pt()/CoFeB films. Taking adva…
Hydrogen site occupancy and strength of forces in nano-sized metal hydrides
Gunnar K. Pálsson, Moritz Wälde, Martin Amft +5
The dipole force components in nano-sized metal hydrides are quantitatively determined with curvature and x-ray diffraction measurements. Ab-initio density functional theory is use…