from 28 June 2015 to 3 July 2015 (Africa/Johannesburg)
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SAIP2015 Proceeding published on 17 July 2016
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Ferromagnetism in Chromium-doped Rutile, Anatase and Brookite phases of Titanium dioxide

Presented by Ms. Winfred Mueni MULWA on 30 Jun 2015 from 15:20 to 15:40
Type: Oral Presentation
Session: DPCMM
Track: Track A - Division for Physics of Condensed Matter and Materials

Abstract

TiO2 doped with Cr has been investigated using density functional theory with the Hubbard term (DFT+U), In addition to electronic properties, we have also investigated the magnetic properties Cr-doped TiO2. Among the crystal structure investigated includes rutile, anatase and brookite TiO2. From the study we observed that, between 0-5% Cr doping, the systems displayed a paramagnetic behavior while between 6-8% the systems exhibit ferromagnetic characteristics. The magnetic moment was found to increase with the increase in doping percentage upto 6%, above 6% the magnetic moment remained constant (~2µB) indicating magnetic saturation. The anatase structures highly favors Cr doping than rutile and brookite.

Award

Yes

Level

PhD

Supervisor

Francis Dejene dejenebf@qwa.uovs.ac.za University of the Free State-Qwaqwa campus, Department of physics

Paper

No

Permission

Yes

Primary authors

  • Ms. Winfred Mueni MULWA University of the Free State-Qwaqwa campus, Department of physics, Private Bag x13, Phuthaditjhaba, 9866, SOUTH AFRICA
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Co-authors

  • Dr. CECIL N.M OUMA University of Pretoria, Department of Physics, Private Bag x20, Hatfield, Pretoria, 0028, SOUTH AFRICA.
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