Critical spin dynamics in Rb2CrCl4: A nearly two-dimensional easy-plane ferromagnet

Hutchings, M. T.; Day, Peter; Janke, E; Pynn, R.

doi:10.1016/0304-8853(86)90205-2

Cited by 35 publications

(13 citation statements)

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“…2d, possibly XY-like, behaviour sets in above Tc + 3 K, whence the critical neutron scattering takes the form of rods of intensity parallel to [OOl] in reciprocal space [3]. The dynamic critical scattering in zero external field at (q, q, 2.9) was previously studied using unpolarised neutrons [4]. The data as q -r 0 and T -r Tc were successfully analysed in terms of sharp (resolution limited) spin waves and a broad Lorentzian central peak, although the polarisation of the fluctuations giving rise to these components could not be identified.…”

mentioning

confidence: 99%

IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb₂CrCl₄ : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET

Bramwell¹,

Hutchings²,

Norman³

et al. 1988

J. Phys. Colloques

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confidence: 99%

IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb₂CrCl₄ : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET

Bramwell¹,

Hutchings²,

Norman³

et al. 1988

J. Phys. Colloques

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“…Planar ferromagnets are realized by layered compounds such as K 2 CuF 4 [11] and Rb 2 CrCl 4 [12] which almost act as two-dimensional systems. The best results available today have been obtained on CoCl 2 intercalated in graphite [13], where a crossover from two-dimensional to three-dimensional behavior in the correlations has been observed below the Kosterlitz-Thouless temperature.…”

Section: Introductionmentioning

confidence: 99%

Spin-dynamics simulations of the three-dimensionalXYmodel: Structure factor and transport properties

Krech

Landau

1999

Phys. Rev. B

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We present extensive Monte-Carlo spin dynamics simulations of the classical XY model in three dimensions on a simple cubic lattice with periodic boundary conditions. A recently developed efficient integration algorithm for the equations of motion is used, which allows a substantial improvement of statistics and large integration times. We find spin wave peaks in a wide range around the critical point and spin diffusion for all temperatures. At the critical point we find evidence for a violation of dynamic scaling in the sense that independent components of the dynamic structure factor S(q, ω) require different dynamic exponents in order to obtain scaling. Below the critical point we investigate the dispersion relation of the spin waves and the linewidths of S(q, ω) and find agreement with mode coupling theory. Apart from strong spin wave peaks we observe additional peaks in S(q, ω) which can be attributed to two-spin wave interactions. The overall lineshapes are also discussed and compared to mode coupling predictions. Finally, we present first results for the transport coefficient D(q, ω) of the out-of-plane magnetization component at the critical point, which is related to the thermal conductivity of 4 He near the superfluid-normal transition.

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“…The 2-D anisotropic Heisenberg model can be realized by several compounds as for example BaCo 2 (AsO 4 ) 2 [27], stage-2 CoCl 2 -GIC [28][29][30][31][32] and Rb 2 CrCl 4 [33][34][35]. The simplest microscopic model capable of supporting vortex excitations is the classical two-dimensional …”

Section: The Vortex-driven Phase Transition In the Anisotropic Heisenmentioning

confidence: 99%

Vortices in Low-Dimensional Magnetic Systems

Costa

2011

Braz J Phys

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Vortices are objects that are important to describe several physical phenomena. There are many examples of such objects in nature as in a large variety of physical situations like in fluid dynamics, superconductivity, magnetism, and biology. Historically, the interest in magnetic vortex-like excitations begun in the 1960s. That interest was mainly associated with an unusual phase-transition phenomenon in two-dimensional magnetic systems. More recently, direct experimental evidence for the existence of magnetic vortex states in nano-disks was found. The interest in such model was renewed due to the possibility of the use of magnetic nano-disks as bit elements in nano-scale memory devices. The goal of this study is to review some key points for the understanding of the vortex behavior and the progress that have been done in the study of vortices in low-dimensional magnetic systems.

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Critical spin dynamics in Rb2CrCl4: A nearly two-dimensional easy-plane ferromagnet

Cited by 35 publications

References 4 publications

IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb₂CrCl₄ : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET

IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb₂CrCl₄ : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET

Spin-dynamics simulations of the three-dimensionalXYmodel: Structure factor and transport properties

Vortices in Low-Dimensional Magnetic Systems

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Critical spin dynamics in Rb2CrCl4: A nearly two-dimensional easy-plane ferromagnet

Cited by 35 publications

References 4 publications

IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb2CrCl4 : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET

IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb2CrCl4 : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET

Spin-dynamics simulations of the three-dimensionalXYmodel: Structure factor and transport properties

Vortices in Low-Dimensional Magnetic Systems

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Product

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IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb₂CrCl₄ : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET

IDENTIFICATION OF FLUCTUATING SUSCEPTIBILITY COMPONENTS IN Rb₂CrCl₄ : A QUASI-2-DIMENSIONAL EASY PLANE FERROMAGNET