Photoinduced Electron Spin Resonance Phenomenon inα-Cr2O3Nanospheres-Reference-Cited by-同舟云学术

Photoinduced Electron Spin Resonance Phenomenon inα-Cr2O3Nanospheres

Published:2015 Issue: Volume:2015 Page:1-8
ISSN:1687-4110
Container-title:Journal of Nanomaterials
language:en
Short-container-title:Journal of Nanomaterials

Author:

Khamlich S.¹²,Srinivasu V. V.¹²,Konkin A.¹²³,Cingo N.¹²⁴,Thema F. T.¹²,Benyoussef A.¹²,Maaza M.¹²

Affiliation:

1. UNESCO Africa Chair in Nanosciences & Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, P.O. Box 392, Pretoria, South Africa

2. Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129, P.O. Box 722, Somerset West, Western Cape, South Africa

3. Institute for Micro- and Nanotechnologies, Ilmenau University of Technology, Gustav-Kirchhoff Street 7, P.O. Box 100565, 98693 Ilmenau, Germany

4. National Laser Centre, Council for Scientific and Industrial Research, P.O. Box 395, Pretoria 0001, South Africa

Abstract

The photoinduced phenomenon inα-Cr2O3nanoscaled spherical particles was investigated in the temperature range of 150 up to 315 K. An X-band electron-spin resonance spectrometry was employed to probe the magnetic behavior inα-Cr2O3under an IR illumination in the nanosecond regime. The photoinduced effect on both low and high field ESR signals appears above 280 K and is remarkably enhanced just below Néel temperatureTN. Such a photoinduced ESR phenomenon disappears in a reproducible way in the paramagnetic insulating state which occurs aboveTNof crystallineα-Cr2O3. In the antiferromagnetic phase, that is, belowTN, the shift of the low field absorption could be attributed to the interaction of the light with specific Cr3+ions located in strongly distorted sites correlated to strong ligand-field effect.

Funder

UNESCO UNISA Africa Chair in Nanosciences

Publisher

Hindawi Limited

Subject

General Materials Science

Link

http://downloads.hindawi.com/journals/jnm/2015/831065.pdf

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