Quantized spin-wave modes in long cylindrical ferromagnetic nanowires in a transverse external magnetic field

2005 ◽  
Vol 71 (18) ◽  
Author(s):  
Elena V. Tartakovskaya
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Spin Wave ◽  
Ferromagnetic Nanowires ◽  
Wave Modes

Magnetic field dependence of quantized and localized spin wave modes in thin rectangular magnetic dots

2004 ◽  
Vol 16 (43) ◽  
pp. 7709-7721 ◽  
Author(s):  
G Gubbiotti ◽  
M Conti ◽  
G Carlotti ◽  
P Candeloro ◽  
E Di Fabrizio ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
Magnetic Dots ◽  
Wave Modes

Spin Wave Based Logic Circuits

2007 ◽  
Vol 998 ◽  
Author(s):  
Alexander Khitun ◽  
Mingqiang Bao ◽  
Joo-Young Lee ◽  
Kang Wang ◽  
Dok Won Lee ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Spin Wave ◽  
Room Temperature ◽  
Ferromagnetic Film ◽  
Logic Gates ◽  
Logic Circuits ◽  
Device Structure ◽  
Wave Transport ◽  
Ferromagnetic Nanostructures

ABSTRACTWe investigate spin wave propagation and interference in conducting ferromagnetic nanostructures for potential application in spin wave based logic circuits. The novelty of this approach is that information transmission is accomplished without charge transfer. A bit of information is encoded into the phase of spin wave propagating in a nanometer thick ferromagnetic film. A set of “AND”, “NOR”, and “NOT” logic gates can be realized in one device structure by utilizing the effect of spin wave superposition. We present experimental data on spin wave transport in 100nm CoFe films at room temperature obtained by the propagation spin wave spectroscopy technique. Spin wave transport has been studied in the frequency range from 0.5 GHz to 6.0 GHz under different configurations of the external magnetic field. Both phase and amplitude of the spin wave signal are sensitive to the external magnetic field showing 60Deg/10G and 4dB/20G modulation rates, respectively. Potentially, spin wave based logic circuits may compete with traditional electron-based ones in terms of logic functionality and power consumption. The shortcomings of the spin wave based circuits are discussed.

scholarly journals Field-controlled ultrafast magnetization dynamics in two-dimensional nanoscale ferromagnetic antidot arrays

2018 ◽  
Vol 9 ◽  
pp. 1123-1134 ◽  
Author(s):  
Anulekha De ◽  
Sucheta Mondal ◽  
Sourav Sahoo ◽  
Saswati Barman ◽  
Yoshichika Otani ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Lattice Constant ◽  
Magnetic Storage ◽  
Magnetization Dynamics ◽  
Bias Magnetic Field ◽  
Potential Applications ◽  
Ultrafast Magnetization ◽  
Antidot Arrays ◽  
Wave Modes

Ferromagnetic antidot arrays have emerged as a system of tremendous interest due to their interesting spin configuration and dynamics as well as their potential applications in magnetic storage, memory, logic, communications and sensing devices. Here, we report experimental and numerical investigation of ultrafast magnetization dynamics in a new type of antidot lattice in the form of triangular-shaped Ni80Fe20 antidots arranged in a hexagonal array. Time-resolved magneto-optical Kerr effect and micromagnetic simulations have been exploited to study the magnetization precession and spin-wave modes of the antidot lattice with varying lattice constant and in-plane orientation of the bias-magnetic field. A remarkable variation in the spin-wave modes with the orientation of in-plane bias magnetic field is found to be associated with the conversion of extended spin-wave modes to quantized ones and vice versa. The lattice constant also influences this variation in spin-wave spectra and spin-wave mode profiles. These observations are important for potential applications of the antidot lattices with triangular holes in future magnonic and spintronic devices.

scholarly journals The effect of material defects on resonant spin wave modes in a nanomagnet

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Md Ahsanul Abeed ◽  
Sourav Sahoo ◽  
David Winters ◽  
Anjan Barman ◽  
Supriyo Bandyopadhyay
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
Fabrication Process ◽  
Material Defects ◽  
Resonant Modes ◽  
Fabrication Defects ◽  
Thickness Variations ◽  
Wave Modes

Abstract We have theoretically studied how resonant spin wave modes in an elliptical nanomagnet are affected by fabrication defects, such as small local thickness variations. Our results indicate that defects of this nature, which can easily result from the fabrication process, or are sometimes deliberately introduced during the fabrication process, will significantly alter the frequencies, magnetic field dependence of the frequencies, and the power and phase profiles of the resonant spin wave modes. They can also spawn new resonant modes and quench existing ones. All this has important ramifications for multi-device circuits based on spin waves, such as phase locked oscillators for neuromorphic computing, where the device-to-device variability caused by defects can be inhibitory.

Sign in / Sign up

Export Citation Format

Share Document