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- W2185179610 abstract "S tarting from correlation identities for the I sing model we study the effect of a random ficld on the one dimension version of the model. Explicit results for the magnetization, the two - particle corre- lation function and the specific heat are obtained for an uncorrelated distributio~ of the random fields. The comparison of the energy gained by forming small randomly oriented domains in the random field with the energy lost atthebound- aries of the domains, lead Imry and ~a' to conclude that onl y three- -dimensional islng systerns would remain oriented in the presence of a random field. They showed that the effect of a small random fleld isto reduce the lower critical dimensionality (d ) of these systems to d =2. C C Fishman and ~haron~~ argued that the behavior of the Ising ferromagnet in a random qield would be the same as in a randomly di luted I sing antiferromgnet in the presence of an externa1 constant field. Since then, a great nuniber of both experimental and theoretical w~rks~'~ have been published on the subject. Two experimental techniques have been used in order to inves- tigate such systems: neutron - scattering and cptical birefringence ex- periments. Early n eutron - scattering investigations performed by Yoshizawa et aii5 showed that the randoin field destroys the osder in both two and the three-dimensional systems. :birefringence mea~urements?'~ shoh that the -range magnetic order at two-dimensions as case, and increases the sharpness of tranci in the Feo., Znoe4 F, case. Also, according" @default.
- W2185179610 created "2016-06-24" @default.
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- W2185179610 date "1984-01-01" @default.
- W2185179610 modified "2023-10-02" @default.
- W2185179610 title "Specific Heat of the Ising Linear Chain in a Random Field" @default.
- W2185179610 hasPublicationYear "1984" @default.
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