First principles based design and experimental evidence for a ZnO-based ferromagnet at room temperature

The introduction of ferromagnetic order in ZnO results in a transparent piezoelectric ferromagnet and further expands its already wide range of applications into the emerging field of spintronics. Through an analysis of density functional calculations we determine the nature of magnetic interactions...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2005-05, Vol.94 (18), p.187204-187204, Article 187204
Main Authors: Sluiter, Marcel H F, Kawazoe, Y, Sharma, Parmanand, Inoue, A, Raju, A R, Rout, C, Waghmare, U V
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The introduction of ferromagnetic order in ZnO results in a transparent piezoelectric ferromagnet and further expands its already wide range of applications into the emerging field of spintronics. Through an analysis of density functional calculations we determine the nature of magnetic interactions for transition metals doped ZnO and develop a physical picture based on hybridization, superexchange, and double exchange that captures chemical trends. We identify a crucial role of defects in the observed weak and preparation sensitive ferromagnetism in ZnO:Mn and ZnO:Co. We predict and explain co-doping of Li and Zn interstitials to both yield ferromagnetism in ZnO:Co, in contrast with earlier insights, and verify it experimentally.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.94.187204