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Persistent URL http://purl.org/net/epubs/work/1276
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Record Id 1276
Title Spin density fluctuations in a Heisenberg ferromagnet
Abstract The longitudinal susceptibility, a measure of magnetization fluctuations, is studied within the framework of the Dyson hamiltonian. Results for models appropriate to EuO and EuS show that near Tc the fluctuations included in the Hartree-Fock approximation more than double the susceptibility. It is shown that inclusion of the fluctuations does not change the exponent in the power law divergence of the susceptibility with respect to a magnetic field. Results for the magnetization and spin wave renormalization, including the influence of the dipolar energy, are given for EuO and EuS, and compared favourably with the available experimental data.
Organisation ISIS , ISIS-THEORY , SERC
Keywords Physics , ISIS 1993 (RAL Report) , ISIS 1994
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Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article J Phys-Condens Mat 5 (1993): 3241. doi:10.1088/0953-8984/5/19/020 1993
Report RAL Technical Reports RAL-93-005. 1993. RAL-TR-1993-005.pdf 1993