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pro vyhledávání: '"Cottam, M. G."'
We have studied both experimentally and theoretically the reprogrammable spin wave band structure in Permalloy(10nm)/Cu(5nm)/Permalloy(30nm) nanowire arrays of width w=280 nm and inter-wire separation in the range from 80 to 280 nm. We found that, de
Externí odkaz:
http://arxiv.org/abs/1903.02935
Reprogrammability of magnonic band structure in layered Permalloy/Cu/Permalloy nanowires is demonstrated to depend on the relative orientation of the two layers magnetization. By using Brillouin light spectroscopy, we show that when the layers are al
Externí odkaz:
http://arxiv.org/abs/1804.06217
Publikováno v:
J. Appl. Phys. 115, 053904 (2014)
Theoretical studies, based on three independent techniques, of the band structure of a one-dimensional width-modulated magnonic crystal under a transverse magnetic field are reported. The band diagram is found to display distinct behaviors when the t
Externí odkaz:
http://arxiv.org/abs/1409.7183
In Ref. [PRL 102, 127202 (2009)] Lee et al. reported the existence of large magnonic bandgaps in one-dimensional width-modulated Permalloy nanostripe waveguides based on OOMMF simulations. However, as the symmetry of the magnetic field pulse they app
Externí odkaz:
http://arxiv.org/abs/1301.2036
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Autor:
Cottam, M. G.1 (AUTHOR) cottam@uwo.ca, Lockwood, D. J.2 (AUTHOR)
Publikováno v:
Scientific Reports. 8/18/2022, Vol. 12 Issue 1, p1-7. 7p.
A theoretical study of the specific heat C(T) as a function of temperature in Fibonacci magnetic superlattices is presented. We consider quasiperiodic structures composed of ferromagnetic films, each described by the Heisenberg model, with biquadrati
Externí odkaz:
http://arxiv.org/abs/cond-mat/0108282
Autor:
Bezerra, C. G., Cottam, M. G.
A theoretical study is made of the magnetization versus applied field curves of ferromagnetic/nonmagnetic multilayers constructed according to a Fibonacci quasiperiodic sequence. The ferromagnetic films are assumed to have uniaxial anisotropy and are
Externí odkaz:
http://arxiv.org/abs/cond-mat/0107127
Publikováno v:
Physical Review B 62, 6545 (2000)
The linear and nonlinear processes in ferromagnetic films at low temperatures T<< Tc are studied in a microscopic theory. Both the long-range magnetic dipole-dipole and the Heisenberg exchange interactions to nearest and next-nearest neighbors are in
Externí odkaz:
http://arxiv.org/abs/cond-mat/0006308
Publikováno v:
J. Appl. Phys. 85 (1999) 5627-5629
Spin dynamics is considered in ferromagnets consisting of electron and nuclear subsystems interacting with each other through hyperfine forces. In addition, the ferromagnetic sample is coupled with a resonance electric circuit. Under these conditions
Externí odkaz:
http://arxiv.org/abs/cond-mat/9908072