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Original Articles

Magnetism without magnetic impurities in oxides ZrO2 and TiO2

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Pages 2755-2764 | Received 16 May 2008, Accepted 01 Jul 2008, Published online: 03 Dec 2010
 

Abstract

We apply the density functional technique to investigate the magnetism induced in transition metal dioxides ZrO2 and TiO2 by substitution of the cation by a vacancy or an impurity from groups 1A or 2A of the periodic table, where the impurity is either K or Ca. It is demonstrated that the vacancy and the K-impurity leads to a robust induced magnetic moment on the surrounding O-atoms for both the cubic ZrO2 and rutile TiO2 host crystals. The native O-vacancy does not induce a magnetic moment in the host dioxide crystal.

Acknowledgements

This work has been done within the project AVOZ1-010-0520 of the ASCR. We acknowledge support from the Grant Agency of the Czech Republic, Contract No. 202/07/0456, COST P19-OC150 project and support from the Grant Agency of the Academy Sciences of the Czech Republic (A100100616).

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