Magnetic neutron scattering investigation of the field-induced Griffiths phase in FeCl2

Details Magnetic neutron scattering investigation of the field-induced Griffiths phase in FeCl2 Magnetic neutron scattering investigation of the field-induced Griffiths phase in FeCl2

1998-09-03

arxiv.org/abs/cond-mat/9809067v1

Phys. Rev. B 54 (1996) 9015

Physics

Condensed Matter

Statistical Mechanics

2 figures

Scientific paper

10.1103/PhysRevB.54.9015

Quasielastic neutron scattering has been utilized to investigate the Griffiths phase induced by an axial magnetic field in FeCl2 at temperatures Tc(H)<=T<=TN, where Tc(H) is the transition temperature in an external magnetic field H. We present the temperature dependence of the integrated neutron scattering intensity at fixed scattering vectors for various magnetic fields. On cooling below TN the antiferromagnetic short-range fluctuations decrease due to an increase of the volume fraction which is already antiferromagnetically ordered. A weighted average of the local contributions to the antiferromagnetic susceptibility quantitatively describes the scattering cross section.

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