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

Marcel H.F. Sluiter, Y. Kawazoe, Parmanand Sharma, A. Inoue, A. R. Raju, C. Rout, U. V. Waghmare

Research output: Contribution to journalArticlepeer-review

449 Citations (Scopus)

Abstract

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 codoping of Li and Zn interstitials to both yield ferromagnetism in ZnO Co, in contrast with earlier insights, and verify it experimentally.

Original languageEnglish
Article number187204
JournalPhysical review letters
Volume94
Issue number18
DOIs
Publication statusPublished - 2005 May 13

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'First principles based design and experimental evidence for a ZnO-based ferromagnet at room temperature'. Together they form a unique fingerprint.

Cite this