Zero-temperature hysteresis in a random-field Ising model on a Bethe lattice: Approach to mean-field behavior with increasing coordination numberz
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چکیده
منابع مشابه
Zero-temperature Hysteresis in Random-field Ising Model on a Bethe Lattice
We consider the single-spin-flip dynamics of the random-field Ising model on a Bethe lattice at zero temperature in the presence of a uniform external field. We determine the average magnetization as the external field is varied from −∞ to +∞ by setting up the self-consistent field equations, which we show are exact in this case. The qualitative behavior of magnetization as a function of the ex...
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We consider the single-spin-flip dynamics of the random-field Ising model on a Bethe lattice at zero temperature in the presence of a uniform external field. We determine the average magnetization as the external field is varied from −∞ to +∞ by setting up the self-consistent field equations, which we show are exact in this case. The qualitative behaviour of magnetization as a function of the e...
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We obtain exact expressions for the minor hysteresis loops in the ferromagnetic random field Ising model on a Bethe lattice at zero temperature in the case when the driving field is cycled infinitely slowly.
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The zero-temperature random-field Ising model is solved analytically for magnetization versus external field for a bilayered Bethe lattice. The mechanisms of infinite avalanches which are observed for small values of disorder are established. The effects of variable interlayer interaction strengths on infinite avalanches are investigated. The spin-field correlation length is calculated and its ...
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The Random Field Ising Model (RFIM) is the simplest physical model reflecting effect of quenched disorder on the different types of phase transitions in solids. The presence of multiple energy minima in the RFIM is an important feature determining main physical properties of the systems with a field type of quenched disorder. In particular, according to computer simulations of Sethna at al. per...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2006
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.73.092414