Long-Wavelength Collective Excitations in Ferromagnetic Insulators. I. Strong Coupling of Acoustic Modes to Spin Wave Modes

1963 ◽  
Vol 130 (1) ◽  
pp. 50-57 ◽  
Author(s):  
R. C. LeCraw ◽  
T. Kasuya
Keyword(s):  
Strong Coupling ◽  
Spin Wave ◽  
Collective Excitations ◽  
Long Wavelength ◽  
Acoustic Modes ◽  
Wave Modes

scholarly journals Identification and time-resolved study of ferrimagnetic spin-wave modes in a microwave cavity in the strong-coupling regime

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
Angelo Leo ◽  
Anna Grazia Monteduro ◽  
Silvia Rizzato ◽  
Luigi Martina ◽  
Giuseppe Maruccio
Keyword(s):  
Strong Coupling ◽  
Spin Wave ◽  
Microwave Cavity ◽  
Strong Coupling Regime ◽  
Time Resolved ◽  
Wave Modes

scholarly journals Electrical characterisation of higher order spin wave modes in vortex-based magnetic tunnel junctions

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Alex. S. Jenkins ◽  
Lara San Emeterio Alvarez ◽  
Samh Memshawy ◽  
Paolo Bortolotti ◽  
Vincent Cros ◽  
...  
Keyword(s):  
Spin Wave ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Higher Order ◽  
Spin Torque ◽  
Micromagnetic Simulations ◽  
Higher Order Modes ◽  
Spin Diode ◽  
Super High Frequency ◽  
Wave Modes

AbstractNiFe-based vortex spin-torque nano-oscillators (STNO) have been shown to be rich dynamic systems which can operate as efficient frequency generators and detectors, but with a limitation in frequency determined by the gyrotropic frequency, typically sub-GHz. In this report, we present a detailed analysis of the nature of the higher order spin wave modes which exist in the Super High Frequency range (3–30 GHz). This is achieved via micromagnetic simulations and electrical characterisation in magnetic tunnel junctions, both directly via the spin-diode effect and indirectly via the measurement of the coupling with the gyrotropic critical current. The excitation mechanism and spatial profile of the modes are shown to have a complex dependence on the vortex core position. Additionally, the inter-mode coupling between the fundamental gyrotropic mode and the higher order modes is shown to reduce or enhance the effective damping depending upon the sense of propagation of the confined spin wave.

scholarly journals Phase resolved observation of spin wave modes in antidot lattices

2021 ◽  
Vol 118 (23) ◽  
pp. 232403
Author(s):  
Felix Groß ◽  
Mateusz Zelent ◽  
Ajay Gangwar ◽  
Sławomir Mamica ◽  
Paweł Gruszecki ◽  
...  
Keyword(s):  
Spin Wave ◽  
Wave Modes

Intensity distribution, evolution, and dispersion of discrete spin wave modes in nanoscale spin-torque oscillator

2021 ◽  
Vol 129 (24) ◽  
pp. 243903
Author(s):  
Shizhu Qiao ◽  
Lihui Bai ◽  
Haibin Xue ◽  
Lipeng Hou ◽  
Lijuan Zhang ◽  
...  
Keyword(s):  
Spin Wave ◽  
Intensity Distribution ◽  
Spin Torque ◽  
Wave Modes

scholarly journals Size-dependent magnetization switching characteristics and spin wave modes of FePt nanostructures

2013 ◽  
Vol 113 (20) ◽  
pp. 203910 ◽  
Author(s):  
R. Brandt ◽  
R. Rückriem ◽  
D. A. Gilbert ◽  
F. Ganss ◽  
T. Senn ◽  
...  
Keyword(s):  
Spin Wave ◽  
Magnetization Switching ◽  
Size Dependent ◽  
Switching Characteristics ◽  
Wave Modes

Thermally excited spin wave modes in synthetic antiferromagnetic stripes

2007 ◽  
Vol 310 (2) ◽  
pp. 1949-1951 ◽  
Author(s):  
Yasuo Ando ◽  
Young Min Lee ◽  
Tatsuya Aoki ◽  
Terunobu Miyazaki ◽  
Helmut Schultheiß ◽  
...  
Keyword(s):  
Spin Wave ◽  
Wave Modes

scholarly journals Spin-wave modes in magnetic nanowires

2003 ◽  
Vol 93 (10) ◽  
pp. 7604-7606 ◽  
Author(s):  
R. Skomski ◽  
M. Chipara ◽  
D. J. Sellmyer
Keyword(s):  
Spin Wave ◽  
Magnetic Nanowires ◽  
Wave Modes

scholarly journals THE HYDRODYNAMICAL LIMIT OF QUANTUM HALL SYSTEM

2001 ◽  
Vol 15 (19n20) ◽  
pp. 2771-2781 ◽  
Author(s):  
D. SREEDHAR BABU ◽  
R. SHANKAR ◽  
M. SIVAKUMAR
Keyword(s):  
Landau Level ◽  
Small Amplitude ◽  
Quantum Hall ◽  
Collective Excitations ◽  
Current Form ◽  
Long Wavelength ◽  
Lowest Landau Level ◽  
Hydrodynamical Limit ◽  
Quantum Hall System ◽  
A Current

We study the current algebra of FQHE systems in the hydrodynamical limit of small amplitude, long-wavelength fluctuations. We show that the algebra simplifies considerably in this limit. The Hamiltonian is expressed in a current–current form and the operators creating inter-Landau level and lowest Landau level collective excitations are identified.

Sign in / Sign up

Export Citation Format

Share Document