Exchange bias effect in CaMn1-xRexO3

V. Markovich (1) , I. Fita (2) , A. Wisniewski (2) , R. Puzniak (2) , Christine Martin (3) , G. Jung (1, 2) , G. Gorodetsky (1)

1 BGU - Ben-Gurion University of the Negev
2 IFPAN - Institute of Physics [Warsaw]
3 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

Exchange bias effect in CaMn1-xRexO3 (x <= 0.1) has been investigated. The effect is very small in the samples doped at x = 0.02 and 0.04, but increases monotonously with further increase in Re doping. For x = 0.1, both vertical and horizontal shifts in hysteresis loop of field cooled sample decrease monotonously with increasing temperature and vanish above 70 K, while coercivity disappears only above 90 K upon approaching the N ' eel temperature. Exchange bias field, coercivity, and remanence asymmetry depend sensitively on temperature and maximal measuring field. Magnetic training effect has been studied for x = 0.06, 0.08, 0.1 samples and analyzed using a spin relaxation model. The observed exchange bias is attributed to the low-temperature phase separation into ferromagnetic clusters and the G-type and/or C-type antiferromagnetic matrix.

Keywords: Magnetism and Magnetic Materials

Domains: Chemical Sciences; Chemical Sciences; Cristallography; Chemical Sciences; Material chemistry; Chemical Sciences; Theoretical and/or physical chemistry

V. Markovich, I. Fita, A. Wisniewski, R. Puzniak, Christine Martin, et al.. Exchange bias effect in CaMn1-xRexO3. AIP Advances, 2017, 7 (5), pp.055801. ⟨10.1063/1.4972798⟩. ⟨hal-02175451⟩