Magnetism and Neutron Scattering

Neutron scattering study of transverse magnetism

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 temperat...

Neutron-scattering studies of magnetism in multiferroic HoMnO3 „invited..

Hexagonal HoMnO3 is a frustrated antiferromagnet TN=72 K ferroelectric TC=875 K with a rich magnetic phase diagram consisting of multiple temperatureand field-dependent phases. Previously observed anomalies in the dielectric constant at magnetic phase transitions indicate strong coupling between the ferroelectricity and magnetism. Neutron-diffraction measurements in a magnetic field reveal new ...

Spin and Magnetism in Old Neutron Stars

The thermal, spin and magnetic evolution of neutron stars in the old low mass binaries is first explored. Recycled to very short periods via accretion torques, the neutron stars lose their magnetism progressively. If accretion proceeds undisturbed for 100 Myrs these stars can rotate close to break up with periods far below the minimum observed of 1.558 ms. We investigate their histories using p...

A neutron scattering study of the interplay between structure and magnetism in Ba(Fe1−xCox)2As2

C. Lester, Jiun-Haw Chu, 3 J. G. Analytis, 3 S. Capelli, A. S. Erickson, 3 C. L. Condron, M. F. Toney, I. R. Fisher, 3 and S.M. Hayden H.H. Wills Physics Laboratory, University of Bristol, Tyndall Ave., Bristol, BS8 1TL, UK Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, Stanford, CA 94305 Stanford Institute for Materials and Energy Sciences, SL...

Experimental evidence for lamellar magnetism in hemo-ilmenite by polarized neutron scattering