Interface Magnetism and Spin Wave Scattering in Ferromagnet-Insulator-Ferromagnet Tunnel Junctions

1998 ◽  
Vol 80 (13) ◽  
pp. 2941-2944 ◽  
Author(s):  
Jagadeesh S. Moodera ◽  
Janusz Nowak ◽  
Rene J. M. van de Veerdonk
Keyword(s):  
Spin Wave ◽  
Wave Scattering ◽  
Tunnel Junctions ◽  
Interface Magnetism

scholarly journals Spin wave scattering and interface magnetism in superconducting-ferromagnet-superconducting hybrid structures

2009 ◽  
Vol 105 (7) ◽  
pp. 07E326 ◽  
Author(s):  
G. A. Alvarez ◽  
X. L. Wang ◽  
T. Puzzer ◽  
G. Peleckis ◽  
S. X. Dou
Keyword(s):  
Spin Wave ◽  
Wave Scattering ◽  
Hybrid Structures ◽  
Interface Magnetism

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.

On the Multiple Spin Wave Scattering of Neutrons in Ferromagnets

1956 ◽  
Vol 69 (12) ◽  
pp. 939-940 ◽  
Author(s):  
R J Elliott ◽  
R D Lowde ◽  
W Marshall
Keyword(s):  
Spin Wave ◽  
Wave Scattering

EFFECTS OF PHOTO-EXCITATION AND MAGNON SCATTERING ON FERROMAGNETIC TRANSITION TEMPERATURE OF THE DILUTED MAGNETIC SEMICONDUCTOR (Ga1 - x, Mnx)As

2011 ◽  
Vol 25 (04) ◽  
pp. 273-280 ◽  
Author(s):  
CHERNET AMENTE ◽  
P. SINGH
Keyword(s):  
Transition Temperature ◽  
Spin Wave ◽  
Wave Scattering ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Ferromagnetic Transition ◽  
Photon Irradiation ◽  
Model Hamiltonian ◽  
Diluted Magnetic ◽  
System Properties

Effects of photo-excitation and spin-wave scattering on magnetization of the diluted magnetic semiconductor (DMS) ( Ga , Mn ) As are theoretically studied. Green function formalism is used to find expression for magnetization and ferromagnetic transition temperature TC starting with a model Hamiltonian consisting of magnons, photons and an interaction of magnons with photons. According to our calculation, there is TC in the absence of magnetic impurity, x = 0, indicating that there could be electronically unpaired influential carriers/holes induced by photon irradiation resulting in residual itinerant band magnetization which can be revealed by experiments. Unusual upturn in magnetization near 0 K temperature values for larger magnon–photon coupling constant is also indicated. Moreover, enhancement of magnetization is established with increase in impurity concentration and even further in the presence of photon–magnon coupling which however decreases due to spin-wave scattering. This leads to the conclusion that at lower temperatures photon irradiation and at higher temperatures spin-wave scattering could affect the system properties predominantly.

Microstructure and spin wave scattering in polycrystalline yttrium iron garnet

1984 ◽  
Vol 43 (3) ◽  
pp. 256-260 ◽  
Author(s):  
V. Saraswati ◽  
M.S. Multani ◽  
V.R. Palkar ◽  
R. Vijayaraghavan ◽  
A. Gurjar
Keyword(s):  
Spin Wave ◽  
Wave Scattering ◽  
Yttrium Iron Garnet ◽  
Yttrium Iron ◽  
Iron Garnet

Spin‐Wave Scattering of Polarized Neutrons from Nickel and Cobalt

1965 ◽  
Vol 36 (3) ◽  
pp. 1076-1077 ◽  
Author(s):  
T. Riste ◽  
G. Shirane ◽  
H. A. Alperin ◽  
S. J. Pickart
Keyword(s):  
Spin Wave ◽  
Wave Scattering ◽  
Polarized Neutrons

Spin Wave-Spin Wave Scattering in a Heisenberg Ferromagnet

1964 ◽  
Vol 12 (19) ◽  
pp. 540-541 ◽  
Author(s):  
R. G. Boyd ◽  
Joseph Callaway
Keyword(s):  
Spin Wave ◽  
Wave Scattering ◽  
Heisenberg Ferromagnet
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