On the High-Temperature Susceptibility for the Heisenberg Model of a Ferromagnet

Rushbrooke, G. S.; Wood, P.J.

doi:10.1088/0370-1298/68/12/309

Cited by 65 publications

(21 citation statements)

References 6 publications

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“…Values calculated at equilibrium (J eq ) and experimental (J ex ) structure are reported in Table V. We can remark the excellent agreement of the VPSIC value (-6.1 meV) with J=-6.6 meV extracted from the diagrammatic Rushbrook-Wood formula 48 for the magnetic susceptibility corresponding to the experimental Neel temperature T N =130 K. The VPSIC also compares fairly well with those calculated by CI (8.1 meV) and HF (10.7 meV) in Ref. 41.…”

Section: Magnetic Manganites: Camno3supporting

confidence: 52%

Variational pseudo-self-interaction-corrected density functional approach to theab initiodescription of correlated solids and molecules

et al. 2011

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We present a fully variational generalization of the pseudo self-interaction correction (VPSIC) approach previously presented in two implementations based on plane-waves and atomic orbital basis set, known as PSIC and ASIC, respectively. The new method is essentially equivalent to the previous version for what concern the electronic properties, but it can be exploited to calculate total-energy derived properties as well, such as forces and structural optimization. We apply the method to a variety of test cases including both non-magnetic and magnetic correlated oxides and molecules, showing a generally good accuracy in the description of both structural and electronic properties.

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Section: Magnetic Manganites: Camno3supporting

confidence: 52%

Variational pseudo-self-interaction-corrected density functional approach to theab initiodescription of correlated solids and molecules

et al. 2011

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“…In particular, the AFHM has previously been extensively investigated by different techniques including the Green function method, [17] Monte Carlo simulations, [18] high-temperature series expansion method (HTSE), [12,19] etc. To analyze the experimental χ(T) dependence of the salt 5 in the low-temperature range (2-8 K), we used the LTSE formula of Johnston [11] which was parameterized to reproduce the results of quantum Monte Carlo simulations for spin 1/2 2D-AFHM.…”

Section: Resultsmentioning

confidence: 99%

“…This relation also provides a rough estimation of |J| ≈ 3.4 cm -1 . To analyze χ(T) in the temperature range 14-300 K, we used an HTSE method of Rushbrooke and Wood [12] for the inverse susceptibility. Figure 4A (solid curve) demonstrates the best fit of experimental data by the HTSE with g = (1.93 Ϯ 0.04) and J = (-4.8 Ϯ 0.3) cm -1 .…”

Section: Resultsmentioning

confidence: 99%

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Cobaltocenium [1,2,5]Thiadiazolo[3,4‐c][1,2,5]thiadiazolidyl: Synthesis, Structure, and Magnetic Properties

et al. 2008

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(5) in 93 % yield. The XRD structure of 5 displays layers of radical anions 1, with S···N contacts of 358.2 and 366.0 pm between neighboring species. The salt was further characterized by ESR spectroscopy in the solid state as well as in solution. The temperature dependence of its magnetic susceptibility (χ) in the range of 2-300 K with a maximum at (9.7 Ϯ 0.5) K indicates antiferromagnetic ordering of the spin system. The magnetic structure of 5 was analyzed in terms of dimeric exchange integrals calculated by a spin-unrestricted broken-

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“…Within the two different large-N formulations, the lowtemperature properties of quantum Heisenberg models have been investigated [7], both in ferromagnetic (FM) and antiferromagnetic (AFM) situation. A Heisenberg's FM model has also been used to deal with the high temperature susceptibility [8].…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of spin-1/2 Fermi gases with ferromagnetic interaction

2015

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We investigate the magnetic properties of spin-1/2 charged Fermi gases with ferromagnetic coupling via mean-field theory, and find the interplay among the paramagnetism, diamagnetism and ferromagnetism. Paramagnetism and diamagnetism compete with each other. When increasing the ferromagnetic coupling the spontaneous magnetization occurs in a weak magnetic field. The critical ferromagnetic coupling constant of the paramagnetic phase to ferromagnetic phase transition increases linearly with the temperature. Both the paramagnetism and diamagnetism increase when the magnetic field increases. It reveals the magnetization densityM increases firstly as the temperature increases, and then reaches a maximum. Finally the magnetization densityM decreases smoothly in the high temperature region. The domed shape of the magnetization densityM variation is different from the behavior of Bose gas with ferromagnetic coupling. We also find the curve of susceptibility follows the Curie-Weiss law, and for a given temperature the susceptibility is directly proportional to the Landé factor.

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On the High-Temperature Susceptibility for the Heisenberg Model of a Ferromagnet

Cited by 65 publications

References 6 publications

Variational pseudo-self-interaction-corrected density functional approach to theab initiodescription of correlated solids and molecules

Variational pseudo-self-interaction-corrected density functional approach to theab initiodescription of correlated solids and molecules

Cobaltocenium [1,2,5]Thiadiazolo[3,4‐c][1,2,5]thiadiazolidyl: Synthesis, Structure, and Magnetic Properties

Magnetic properties of spin-1/2 Fermi gases with ferromagnetic interaction

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