scholarly journals Thermodynamics of ferromagnetic spin chains in a magnetic field: Impact of the spin–wave interaction

2014 ◽  
Vol 442 ◽  
pp. 81-89 ◽  
Author(s):  
Christoph P. Hofmann
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Wave Interaction ◽  
Spin Chains

scholarly journals Mutual phase locking of very nonidentical spin torque nanooscillators via spin wave interaction

2014 ◽  
Vol 67 (2) ◽  
pp. 20601 ◽  
Author(s):  
Ansar R. Safin ◽  
Nicolay N. Udalov ◽  
Mikhail V. Kapranov
Keyword(s):  
Spin Wave ◽  
Phase Locking ◽  
Wave Interaction ◽  
Spin Torque

Modified version of ferromagnetic spin-wave excitations in the presence of a magnetic field

Physica B+C ◽  
1988 ◽  
Vol 150 (3) ◽  
pp. 423-424
Author(s):  
Shoichi Nagata ◽  
Shuji Ebisu ◽  
Satoshi Taniguchi
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Spin Wave Excitations

Spin wave interferometer employing a local nonuniformity of the effective magnetic field

2007 ◽  
Vol 101 (11) ◽  
pp. 113919 ◽  
Author(s):  
S. V. Vasiliev ◽  
V. V. Kruglyak ◽  
M. L. Sokolovskii ◽  
A. N. Kuchko
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Effective Magnetic Field

scholarly journals Critical properties of gapped spin-chains and ladders in a magnetic field

1997 ◽  
Vol 55 (9) ◽  
pp. 5816-5826 ◽  
Author(s):  
R. Chitra ◽  
T. Giamarchi
Keyword(s):  
Magnetic Field ◽  
Spin Chains ◽  
Critical Properties

scholarly journals Ferromagnetic Ising Spin Chains Emerging from the Spin Ice under Magnetic Field

2003 ◽  
Vol 72 (12) ◽  
pp. 3045-3048 ◽  
Author(s):  
Zenji Hiroi ◽  
Kazuyuki Matsuhira ◽  
Masao Ogata
Keyword(s):  
Magnetic Field ◽  
Spin Chains ◽  
Spin Ice ◽  
Ising Spin

scholarly journals High-speed shear-driven dynamos. Part 1. Asymptotic analysis

2019 ◽  
Vol 868 ◽  
pp. 176-211 ◽  
Author(s):  
Kengo Deguchi
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Solar Phys ◽  
Wave Interaction ◽  
Resonant Absorption ◽  
Base Flow ◽  
Transition To Turbulence ◽  
Alfven Wave ◽  
Hydrodynamic Theory ◽  
Large Reynolds Number

Rational large Reynolds number matched asymptotic expansions of three-dimensional nonlinear magneto-hydrodynamic (MHD) states are the concern of this contribution. The nonlinear MHD states, assumed to be predominantly driven by a unidirectional shear, can be sustained without any linear instability of the base flow and hence are responsible for subcritical transition to turbulence. Two classes of nonlinear MHD states are found. The first class of nonlinear states emerged out of a nice combination of the purely hydrodynamic vortex/wave interaction theory by Hall & Smith (J. Fluid Mech., vol. 227, 1991, pp. 641–666) and the resonant absorption theories on Alfvén waves, developed in the solar physics community (e.g. Sakurai et al. Solar Phys., vol. 133, 1991, pp. 227–245; Goossens et al. Solar Phys., vol. 157, 1995, pp. 75–102). Similar to the hydrodynamic theory, the mechanism of the MHD states can be explained by the successive interaction of the roll, streak and wave fields, which are now defined both for the hydrodynamic and magnetic fields. The derivation of this ‘vortex/Alfvén wave interaction’ state is rather straightforward as the scalings for both of the hydrodynamic and magnetic fields are identical. It turns out that the leading-order magnetic field of the asymptotic states appears only when a small external magnetic field is present. However, it does not mean that purely shear-driven dynamos are not possible. In fact, the second class of ‘self-sustained shear-driven dynamo theory’ shows a magnetic generation that is slightly smaller in size in the absence of any external field. Despite its small size, the magnetic field causes the novel feedback mechanism in the velocity field through resonant absorption, wherein the magnetic wave becomes more strongly amplified than the hydrodynamic counterpart.

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