Neutron scattering study of transverse magnetism

Authors

Christian Binek, University of Nebraska-LincolnFollow
T. Kato, Laboratorium f¨ur Angewandte Physik, Gerhard-Mercator-Universit¨at, 47048 Duisburg, Germany
Wolfgang Kleemann, Laboratorium f¨ur Angewandte Physik, Gerhard-Mercator-Universit¨at, 47048 Duisburg, GermanyFollow
O. Petracic, Laboratorium f¨ur Angewandte Physik, Gerhard-Mercator-Universit¨at, 47048 Duisburg, Germany
D. Bertrand, Laboratoire de Physique des Solides, INSA, 31077 Toulouse Cedex, France
F. Bourdarot, Institut Laue Langevin (ILL), 38042 Grenoble Cedex 9, France
P. Burlet, Institut Laue Langevin (ILL), 38042 Grenoble Cedex 9, France
H. Aruga Katori, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, Japan
K. Katsumata, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, Japan
K. Prokes, Hahn-Meitner-Institut (HMI), 14109 Berlin, Germany
S. Welzel, Hahn-Meitner-Institut (HMI), 14109 Berlin, Germany

Date of this Version

12-6-1996

Comments

Published by EDP SCiences. Copyright 2000. Permission to use. Eur. Phys. J. B 15, 35 (2000).

Abstract

In order to clarify the nature of the additional phase transition at H₁ (T) < H_c (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, AFI and AFII. 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 AFI below T₁ are discussed.