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Domain-wall free energy in Heisenberg ferromagnets

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arxiv 1308.3984 v1 pith:IWBBQJEH submitted 2013-08-19 cond-mat.mes-hall cond-mat.stat-mech

Domain-wall free energy in Heisenberg ferromagnets

Boris Sangiorgio , Thomas C. T. Michaels , Danilo Pescia , Alessandro Vindigni This is my paper
classification cond-mat.mes-hall cond-mat.stat-mech
keywords domainenergyfluctuationsfreespinwallsanalyticchains
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider Gaussian fluctuations about domain walls embedded in one- or two-dimensional spin lattices. Analytic expressions for the free energy of one domain wall are obtained. From these, the temperature dependence of experimentally relevant spatial scales -- i.e., the correlation length for spin chains and the size of magnetic domains for thin films magnetized out of plane -- are deduced. Stability of chiral order inside domain walls against thermal fluctuations is also discussed.

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