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Critical neutron scattering above Tc in dipolar ferromagnets

✍ Scribed by C. Aberger; R. Folk

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
247 KB
Volume
156-157
Category
Article
ISSN
0921-4526

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✦ Synopsis

We consider the critical dynamics in the paramagnetic phase of ferromagnets including exchange and dipolar interaction within mode coupling theory. The scaling function for the peak position of the constant energy scans is calculated. We also study effects of pseudodipolar forces in the energy line width.

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## Using inelastic scattering of polarized neutrons at a reduced wavevector 1 qI = O.Slq, transverse to the (2(K))-Bragg reflection (q,, is the dipolar wavenumber) the dynamics of longitudinal spin fluctuations have been measured. The data analysis using a maximum entropy algorithm near I-, is con