In the presence of the strong magnetic field, antiferromagnetic materials are weakly magnetised in the direction the field. This property of the materials is called antiferromagnetism and the materials which exhibit this propert are called antiferromagnetic materials.
Examples of antiferromagnetic substances: MnO, FeO, CoO, NiO, Cr, Mn,
MnO4, MnS, FeCl3, MnF2
Reference: This article is referred from my book “electrical engineering materials” having ISBN 978-81-272-5069-0