Sr2Ir1-xCuxO4 (x = 0, 0.05 and 0.1): Dilute magnetism in a mixed 3d–5d transition-metal oxide

Sourav Marik (1) , Loryne Lefevre (1) , Sébastien Fourcade (1) , Rodolphe Decourt (1) , Olivier Toulemonde (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Herein we have investigated the effect of Cu(3d − transition metal) substitution for the Ir – site on the structure and physical properties of Sr2IrO4. Interestingly, the critical octahedral rotation is found to decrease (increase in Ir – O – Ir angle) with Cu substitution. The resistivity measurements illustrate a significant decrease with Cu substitution, however, keep a semiconducting dependence. Magnetic measurements reveal a decrease in the magnetic transition temperatures. Observed magnetic moment per metal ion shows a decreasing trend as Cu content is increased in the structure. A study of the composition – structure – properties correlation for this interesting and mixed 3d − 5d transition metal system is presented and discussed here.

Domaines: Matériaux

Sourav Marik, Loryne Lefevre, Sébastien Fourcade, Rodolphe Decourt, Olivier Toulemonde. Sr2Ir1-xCuxO4 (x = 0, 0.05 and 0.1): Dilute magnetism in a mixed 3d–5d transition-metal oxide. Journal of Alloys and Compounds, 2018, 735, pp.1908-1913. ⟨10.1016/j.jallcom.2017.11.283⟩. ⟨hal-01671437⟩