Sample preparation and annealing effects on the ferromagnetism in Mn-doped ZnO

Jun Zhang, R. Skomski, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

99 Scopus citations

Abstract

Magnetic properties of Mn-doped ZnO strongly depend on sample preparation and annealing. While the samples sintered in air at 500 °C show ferromagnetism at room temperature, those sintered at 900 °C are paramagnetic. The samples sintered in vacuum show a ferromagnetic transition at 45 K, which is attributed to ferrimagnetic Mn3 O4. With an increase of annealing temperature, the ferromagnetism observed at room temperature in the low-temperature-sintered samples is gradually suppressed and finally completely removed. These results can be understood by considering a metastable ferromagnetic phase and its stability under varying temperatures and atmospheres.

Original languageEnglish (US)
Article number10D303
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
StatePublished - May 15 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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