Spin density fluctuations in a Heisenberg ferromagnet

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Persistent URL	http://purl.org/net/epubs/work/1276
Record Status	Checked
Record Id	1276
Title	Spin density fluctuations in a Heisenberg ferromagnet
Contributors	A Cuccoli (Firenze U.), S W Lovesey (SERC Rutherford Appleton Lab.), G Pedrolli (Firenze U.), V Tognetti (Firenze U.)
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