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Room temperature ferromagnetism in transition metal (V, Cr, Ti) doped In(2)O(3)
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Engineering Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Engineering Material Physics.
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2007 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 101, no 9, 09N513- p.Article in journal (Refereed) Published
Abstract [en]

Indium oxide is chosen as the host material for doping Ti, V, and Cr transition metal ions. Theoretical calculations based on density functional theory within a local spin density approximation show that V-V separation of 5.6 A is more stable with a strong ferromagnetic coupling. Our calculations clearly predict that substitution of vanadium for indium should yield ferromagnetism in In(2)O(3). Experimentally, (In(0.95)TM(0.05))O(3) (TM=Ti,V,Cr) were prepared using sol-gel as well as solid state reaction methods. Superconducting quantum interference device magnetization measurements as a function of field and temperature clearly showed that the V and Cr doped samples are ferromagnetic with Curie temperature well above room temperature. Thin films deposited by pulsed laser ablation using these materials on sapphire substrates exhibit a preferred 222 orientation normal to the plane of the film. The magnetic moment for (In(0.95)V(0.05))O(3) film deposited in 0.1 mbar oxygen pressure was estimated to be 1.7 mu(B)/V and is comparable to the theoretical value of 2 mu(B)/V.

Place, publisher, year, edition, pages
2007. Vol. 101, no 9, 09N513- p.
Keyword [en]
semiconductors, bulk
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-39447DOI: 10.1063/1.2712018ISI: 000246567900458Scopus ID: 2-s2.0-34248524695OAI: oai:DiVA.org:kth-39447DiVA: diva2:440098
Note
Conference: 10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference. Baltimore, MD. JAN 07-11, 2007 Available from: 2011-09-12 Created: 2011-09-09 Last updated: 2017-12-08Bibliographically approved

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