Novel incommensurate magnetic phase in the magnetoelectric Sr-doped cobaltate CaBaCo4O7,

LOHR, J.; LARRALDE, A.; CURIALE, J.; SÁNCHEZ, R. D.; CAMPO, J.; CUELLO, G. J.; SHEPTIAKOV, D.; KELLER, L.; KENZELMANN, M.; AURELIO, G.

Congreso; XXV General Assembly and Congress of the International Union of Crystallography - IUCr 2021; 2021

IUCR

The magnetetoelectric CaBaCo4O7 compound offers an interesting scenario to study frustrated magnetic configurations. The Co2+ andCo3+ ions in tetrahedral oxygen coordination form a three-dimensional framework of interconnected triangular and kagome layeredarrangements [1]. The compound becomes ferrimagnetic below 60 K, and displays a strong increase of electric polarization of 17 000μC/cm2, driven by exchange-striction. In this work, we present our results on the thermal evolution of magnetic and crystallographicproperties of powder samples of Ca1-xSrxBaCo4O7 (x = 0, 0.02, 0.05, 0.07) to study the effect of substitution at the Ca site. We willshow that low doping levels (