Spin reversal, magnetic domains and relaxation mechanisms in Er(Co,Mn)O3 perovskites

Octavio Pena (1) , A. B. Antunes (2) , V. Gil (3) , C. Moure (3) , Sophie de Brion (4)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 GEMA
3 Instituto de Ceramica y Vidrio
4 NEEL - MagSup - Magnétisme et Supraconductivité

Substitution of Mn by a divalent metal in rare-earth manganites REMexMn1 − xO3 results in the simultaneous presence of Mn3+ and Mn4+. The RE sublattice interacts with the local field imposed by the Mn network and may orientate in a parallel direction, or align in the opposite direction resulting in an uncompensated antiferromagnetic structure. We present the magnetic properties of ErCoxMn1 − xO3, in which manganese is substituted by cobalt. Coexistence of different interactions leads to unusual phenomena: a spin reversal, a step-like transition due to a reorientation of domains, a relaxation mechanism connected to the rotation energy of domains, the intersection of increasing and decreasing branches in the magnetization loops.

Mots clés: Field-induced transitions; Spin reversal; Magnetic domains; Magnetic relaxation

Domaines: Matériaux

Octavio Pena, A. B. Antunes, V. Gil, C. Moure, Sophie de Brion. Spin reversal, magnetic domains and relaxation mechanisms in Er(Co,Mn)O3 perovskites. Thin Solid Films, 2010, 518, pp.5666-5669. ⟨10.1016/j.tsf.2009.10.029⟩. ⟨hal-00411416⟩