The A(II)Cr(IV)O₃ (A=Sr, Ca, Pb) ‘simple’ perovskites. Structure and properties: magnetic structure of CaCrO₃

Abstract

The ‘simple’ perovskites ACr(IV)O₃ (A=Sr, Ca, Pb) have been synthesized at high pressure and temperature. Their microstructure and properties are discussed. Specific heat and susceptibility measurements indicate an antiferromagnetic ordering at low temperature in CaCrO₃, which is confirmed to be of the C-type by neutron diffraction.

^†This paper was presented at the XLVI^th European High Pressure Research Group (EHPRG 46) Meeting, Valencia (Spain), 7–12 September, 2008.

Keywords:

• perovskite
• CaCrO₃
• high pressure

Acknowledgements

Samples were obtained at LABCOAP (http://www.ucm.es/info/labcoap/index.htm) with the help of Dr Jose Manuel Gallardo Amores. The authors want to acknowledge Dr Paul Henry and Dr Joost van Duijn for helping with the neutrons. The ILL is also acknowledged for providing beam time and financial support for the neutron experiments. High-pressure experiments (>8 GPa) were performed at the Bayerisches Geoinstitute under the EU Research Infrastructures: Transnational Access Programme (Contract No. 505320 (RITA)-High Pressure). A.M.A.-L. acknowledges CONACYT for a Ph.D. grant. This work was funded by CICYT (Project MAT2007-64007), Comunidad Autónoma de Madrid (Program MATERYENER, PRICYT S-0505/PPQ-0093,2006), and Fundación Areces (Ayudas 2004): Física de Bajas Temperaturas.

Notes

^†This paper was presented at the XLVI^th European High Pressure Research Group (EHPRG 46) Meeting, Valencia (Spain), 7–12 September, 2008.