Eur. Phys. J. B (2013) 86: 256
https://doi.org/10.1140/epjb/e2013-40151-y

Regular Article

Negative remanent magnetization of K₂FeCl₅·H₂O in small magnetic field

International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-421 Wroclaw, Poland

^a e-mail: nizhan@ml.pan.wroc.pl

Received: 22 February 2013
Received in final form: 7 April 2013
Published online: 10 June 2013

Abstract

The remanent magnetization M_r on easy-axis antiferromagnetic single crystal K₂FeCl₅·H₂O is investigated. The sign of the remanent magnetization depends on the direction of the applied magnetic field H; if it is perpendicular to the easy axis of antiferromagnet then the sign of the remanent magnetization is positive, i.e. it coincides with the sign of the magnetic field in which the sample was cooled down below T_N. Instead, if the magnetic field is directed along the easy axis then the sign of the remanent magnetization is negative and its absolute value is three orders of magnitude larger than usual magnetization M(T_N, H).