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Magnetic nanocluster formation of Fe ions embedded in SiO2 and Al2O3 substrates

Published online by Cambridge University Press:  03 May 2018

K. Bharuth-Ram ,
C. Ronning  and
T. B. Doyle
K. Bharuth-Ram*
Affiliation:
Physics Department, Durban University of Technology, Durban 4000, South Africa School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000, South Africa
C. Ronning
Affiliation:
Physics Department, Durban University of Technology, Durban 4000, South Africa Institute for Solid State Physics, Friedrich-Schiller-University, Jena, Germany
T. B. Doyle
Affiliation:
Materials Research Division, iThemba LABS, Somerset West, South Africa
*
*(Email: [email protected])
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Abstract

Research focus in recent years on magnetic behaviour of transition metal (TM) ions embedded in semiconductors has shifted from intrinsic effects to extrinsic effects such as the formation of nanoclusters of the TM ions and the influence of the host matrix on their magnetic behaviour. Our studies, using conversion electron Mössbauer Spectroscopy and magnetization measurements, on SiO2 and Al2O3 substrates implanted with 4 at. % Fe, show ferromagnetic behaviour of α-Fe clusters in amorphous SiO2, but α-Fe2O3 clusters displaying superparamagnetic relaxation in crystalline Al2O3.

Keywords

ion-implantationnanostructuremagnetic properties
Type
Articles
Information
MRS Advances , Volume 3 , Issue 42-43: African Materials Research Society 2017 , 2018 , pp. 2603 - 2608
Copyright
Copyright © Materials Research Society 2018 

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