Neutron scattering study of transverse magnetism
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چکیده
In order to clarify the nature of the additional phase transition at H1(T ) < Hc(T ) of the layered antiferromagnetic (AF) insulator FeBr2 as found by Aruga Katori et al. (1996) we measured the intensity of different Bragg-peaks in different scattering geometries. Transverse AF ordering is observed in both AF phases, AF I and AF II. Its order parameter exhibits a peak at T1 = T (H1) in temperature scans and does not vanish in zero field. Possible origins of the step-like increase of the transverse ferromagnetic ordering induced by a weak in-plane field component when entering AF I below T1 are discussed. PACS. 75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spinpolarized electron studies, synchrotron-source X-ray scattering, etc.) – 75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) – 75.50.Ee Antiferromagnetics
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تاریخ انتشار 2017