Journal ArticleDOI
Critical dynamics in isotropic ferromagnets
TLDR
In this paper, the q 5 2 power law is well borne out at T = Tc, and strong zero-wavenumber relaxation due to spin nonconserving forces can make the predicted hydrodynamic spin diffusion at T > Tc unobservable.About:
This article is published in Journal of Magnetism and Magnetic Materials.The article was published on 1984-11-01. It has received 33 citations till now. The article focuses on the topics: Spin diffusion & Inelastic scattering.read more
Citations
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Journal ArticleDOI
Spin-dynamics study of the dynamic critical behavior of the three-dimensional classical Heisenberg ferromagnet.
Kun Chen,David P. Landau +1 more
TL;DR: A dynamic finite-size scaling theory for the neutron-scattering function was developed and found to be valid for momentum transfer q up to 0.4\ensuremath{\pi} in the (1,0,0) direction.
Journal ArticleDOI
Critical phenomena studied via nuclear techniques
TL;DR: In this paper, the authors outline the theoretical framework used to describe the modern theory of critical phenomena, discuss the strengths and weakness of various experimental methods, and provide a selection of the best experiments that test the theory.
Journal ArticleDOI
Large scales–long times: Adding high energy resolution to SANS
TL;DR: In this paper, the authors present a design case for enhancing a small-angle neutron scattering (SANS) instrument at the planned European Spallation Source (ESS) in Lund, Sweden, using a combination of MIEZE and other TOF options, such as TISANEoffering time windows from ns to minutes.
Journal ArticleDOI
Study of magnon dynamics in Fe near Tc by modified neutron spin echo techniques
B. Farago,F. Mezei +1 more
TL;DR: In this article, the principle of a new variant in Neutron Spin Echo (NSE) spectroscopy, called Intensity Modulation NSE, has been established, which extends the capabilities of NSE to the study of samples which fully depolarize the beam and also to the possibility of separate, independent investigation of spin-flip and non-spinflip scattering processes.
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On the critical dynamics of ferromagnets
Erwin Frey,Franz Schwabl +1 more
TL;DR: In this paper, the dynamic scaling functions for ferromagnets above and below the critical temperature are determined using mode coupling theory, and the results of different experimental methods are explained in a unified fashion.
References
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Book
Modern Theory of Critical Phenomena
TL;DR: Ma as mentioned in this paper introduces the beginner to fundamental theoretical concepts such as mean field theory, scaling hypothesis, and renormalization group, with emphasis on the underlying physics and the basic assumptions involved.
Journal ArticleDOI
Scaling Laws for Dynamic Critical Phenomena
TL;DR: In this article, the usual static scaling laws are generalized to nonequilibrium phenomena by making assumptions on the behavior of time-dependent correlation functions near the critical point of second-order phase transitions.
Journal ArticleDOI
Critical and Spin-Wave Scattering of Neutrons from Iron
TL;DR: In this article, the wavelength and frequency dependence of neutrons magnetically scattered from iron has been studied with high resolution from low temperatures to $1.05. But no peak corresponding to a diffusive mode has been observed in the scattering, in contrast to the antiferromagnet RbMn${\mathrm{F}}_{3}, where the existence of such a peak has been clearly demonstrated.
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Dipolar Interactions at Ferromagnetic Critical Points
Michael E. Fisher,Amnon Aharony +1 more
TL;DR: In this paper, exact renormalization-group techniques were used to study the critical behavior for ferromagnets with both isotropic exchange coupling and dipolar interactions in dimensions of $d = 4.