Search for ferromagnetism in transition metal substituted ZnO

Bogdan Dabrowski ,  Stanislaw Kolesnik 

Northern Illinois University (NIU), Faraday Hall W216, De Kalb, Il 60115, United States


The II-VI semiconductor ZnO with both crystal structure (wurtzite) and wide-gap (3.2 eV) similar to GaAs attracted recently considerable attention because of room-temperature ferromagnetism reported in transition metal substituted compounds. If confirmed, these reports, guided by theoretical predictions, would provide practical material for incorporation of spin into semiconductor industry. We have studied structural and magnetic properties of the Mn, Fe, and Co substituted samples synthesized under a wide range of oxygen pressures. No bulk ferromagnetism was observed for any of the single-phase samples obtained over a range of substituted compositions 0 - 20 %. Single-phase compounds demonstrate paramagnetic Curie-Weiss behavior with antiferromagnetic interactions, similar to other diluted semiconductors. Imperfect synthesis conditions could lead to formation of second phases that are responsible for high-temperature ferromagnetic behavior, such as Co-metal and zinc-ferrospinel, or spin-glass behavior observed for ZnMnO3. Absence of ferromagnetism may be caused by our inability to achieve p-type conduction in pure and substituted ZnO.

Supported by the NSF-DMR-0302617 and by the US Department of Education

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. Study of highly oxygen deficient perovskite cathodes 
  2. Novel Properties of Atomically Arranged Perovskites
  3. Influence of pressure on magnetic properties of (Sr, La) (Ru, A)O3 for A = Cr, Mn
  4. Specific heat, magnetocaloric effect and phase diagram of La1-xSrxMnO3 system for 0 ≤ x ≤ 1
  5. Improved Critical Current Properties of Cu1-yMoyBa2-xSrxYCu2O7-d
  6. Design Rules for Manganites with Novel Magnetic and Electronic Properties

Presentation: oral at E-MRS Fall Meeting 2004, Symposium F, by Bogdan Dabrowski
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-04-28 03:45
Revised:   2009-06-08 12:55
© 1998-2022 pielaszek research, all rights reserved Powered by the Conference Engine