Classical quantum crossover in magnetic stochastic resonance in uniaxial superparamagnets
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2010Access:
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Yuri P Kalmykov, Serguey V Titov and William T Coffey, Classical quantum crossover in magnetic stochastic resonance in uniaxial superparamagnets, Journal of Physics: Condensed Matter, 22, 376001, 2010, 7Download Item:
Classical?quantum crossover in magnetic stochastic resonance in uniaxial superparamagnets.pdf (Published (publisher's copy) - Peer Reviewed) 551.8Kb
Abstract:
It is shown that the signal-to-noise ratio of the magnetic moment fluctuations in the magnetic stochastic resonance of a quantum uniaxial paramagnet of arbitrary spin value S subjected to a weak probing ac field H(t) = Hcos t and a dc bias magnetic field H0 displays a pronounced dependence on S. The dependence arises from the quantum dynamics of spins which differs markedly from the magnetization dynamics of classical superparamagnets. In the large spin limit, S??, , the quantum solutions reduce to those for a classical uniaxial superparamagnet.
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European Union (EU)
230785
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http://people.tcd.ie/wcoffeyhttp://people.tcd.ie/kalymyky
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Journal of Physics: Condensed Matter22
376001
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