High-temperature ferromagnetism in pulsed-laser deposited epitaxial (Zn,Mn)O thin films: Effects of substrate temperature

A. K. Pradhan, Kai Zhang, S. Mohanty, J. B. Dadson, D. Hunter, Jun Zhang, D. J. Sellmyer, U. N. Roy, Y. Cui, A. Burger, S. Mathews, B. Joseph, B. R. Sekhar, B. K. Roul

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

We report on the observation of remarkable room-temperature ferromagnetism in epitaxial (Zn,Mn)O films grown by a pulsed-laser deposition technique using high-density targets. The optimum growth conditions were demonstrated from x-ray measurements, microstructure, Rutherford backscattering, micro-Raman, and magnetic studies. Superior ferromagnetic properties were observed in (Zn,Mn)O films grown at a substrate temperature of 500 °C and with an oxygen partial pressure of 1 mTorr. Ferromagnetism becomes weaker with increasing substrate temperature due to the formation of isolated Mn clusters irrespective of higher crystalline quality of the film.

Original languageEnglish (US)
Article number152511
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number15
DOIs
StatePublished - 2005

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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