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High Pressure Research
An International Journal
Volume 30, 2010 - Issue 1: PROCEEDINGS OF THE XLVIITH EUROPEAN HIGH PRESSURE RESEARCH GROUP (EHPRG 47) MEETING, PARIS (FRANCE), 6–11 SEPTEMBER 2009
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Magnetism

Pressure effect on magnetic properties of La0.67Ca0.33(CoxMn1−x)O3 ceramics

M. Zentková Department of Magnetism, Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
,
M. Mihalik Department of Magnetism, Institute of Experimental Physics, Slovak Academy of Sciences, Košice, SlovakiaCorrespondence[email protected]
,
Z. Arnold Department of Magnetics and Superconductors, Institute of Physics ASCR, v.v.i., Prague, Czech Republic
,
J. Kamarád Department of Magnetics and Superconductors, Institute of Physics ASCR, v.v.i., Prague, Czech Republic
&
G. Gritzner Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, Linz, Austria
Pages 12-16 | Received 09 Sep 2009, Published online: 17 Mar 2010
 
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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.

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