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Abstract
In this communication, we compare effects of hydrostatic and chemical pressure on the magnetic properties of La0.67Ca0.33(Co x Mn1−x )O3 ceramics. For ceramics with x=0.03, the Curie temperature T C increases under hydrostatic pressure with a slope d T c/d p=+23.4 K/GPa. The saturated magnetization μs does not change with applied hydrostatic pressure. Chemical pressure was induced by substitution of Co for Mn. The substitution from x=0.03 to x=0.1 reduces the volume of the elementary cell by about 0.28%, but T C decreases from 203.4 to 167 K. The saturated magnetization μs is not affected by this substitution.
Acknowledgements
This work is supported by the projects VEGA 2/7184/27, A100100632 GA AS CR and ERDF EU under the contract no. ITMS26220120005.