Chemical states and ferromagnetism in heavily Mn-substituted zinc oxide thin films

Q. Shao; P. S. Ku; X. L. Wang; J. A. Zapien; C. W. Leung; F. Borgatti; A. Gambardella; V. Dediu; R. Ciprian; A. Ruotolo

doi:10.1063/1.4871759

Chemical states and ferromagnetism in heavily Mn-substituted zinc oxide thin films

Q. Shao
, P. S. Ku
, X. L. Wang
, J. A. Zapien
, C. W. Leung
, F. Borgatti
, A. Gambardella
, V. Dediu
, R. Ciprian
, A. Ruotolo

Centre of Super-Diamond and Advanced Films

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

13 Citations (Scopus)

39 Downloads (CityUHK Scholars)

Abstract

A concentration of Manganese as high as 8% was successfully diluted into Zinc Oxide epitaxial films deposited by pulsed laser deposition. The films showed strong ferromagnetism with a large coercivity. Low temperature X-ray absorption spectroscopy measurements indicated that all the Manganese ions substitute for Zinc sites of the wurtzite lattice in the valency of +2. Photoluminescence measurements excluded the presence of Zinc vacancies, as well as Zn interstitials. All the magnetic moments measured were to ascribe to the formation of bound magnetic polarons, with no other contribution due to Manganese-secondary phases or Zinc vacancy-mediated double exchange interaction. © 2014 AIP Publishing LLC.

Original language	English
Article number	153902
Journal	Journal of Applied Physics
Volume	115
Issue number	15
Online published	17 Apr 2014
DOIs	https://doi.org/10.1063/1.4871759
Publication status	Published - 21 Apr 2014

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Q. Shao, P. S. Ku, X. L. Wang, J. A. Zapien, C. W. Leung, F. Borgatti, A. Gambardella, V. Dediu, R. Ciprian, and A. Ruotolo , "Chemical states and ferromagnetism in heavily Mn-substituted zinc oxide thin films", Journal of Applied Physics 115, 153902 (2014) and may be found at https://doi.org/10.1063/1.4871759.

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title = "Chemical states and ferromagnetism in heavily Mn-substituted zinc oxide thin films",

abstract = "A concentration of Manganese as high as 8\% was successfully diluted into Zinc Oxide epitaxial films deposited by pulsed laser deposition. The films showed strong ferromagnetism with a large coercivity. Low temperature X-ray absorption spectroscopy measurements indicated that all the Manganese ions substitute for Zinc sites of the wurtzite lattice in the valency of +2. Photoluminescence measurements excluded the presence of Zinc vacancies, as well as Zn interstitials. All the magnetic moments measured were to ascribe to the formation of bound magnetic polarons, with no other contribution due to Manganese-secondary phases or Zinc vacancy-mediated double exchange interaction. {\textcopyright} 2014 AIP Publishing LLC.",

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T1 - Chemical states and ferromagnetism in heavily Mn-substituted zinc oxide thin films

AU - Shao, Q.

AU - Ku, P. S.

AU - Wang, X. L.

AU - Zapien, J. A.

AU - Leung, C. W.

AU - Borgatti, F.

AU - Gambardella, A.

AU - Dediu, V.

AU - Ciprian, R.

AU - Ruotolo, A.

PY - 2014/4/21

Y1 - 2014/4/21

N2 - A concentration of Manganese as high as 8% was successfully diluted into Zinc Oxide epitaxial films deposited by pulsed laser deposition. The films showed strong ferromagnetism with a large coercivity. Low temperature X-ray absorption spectroscopy measurements indicated that all the Manganese ions substitute for Zinc sites of the wurtzite lattice in the valency of +2. Photoluminescence measurements excluded the presence of Zinc vacancies, as well as Zn interstitials. All the magnetic moments measured were to ascribe to the formation of bound magnetic polarons, with no other contribution due to Manganese-secondary phases or Zinc vacancy-mediated double exchange interaction. © 2014 AIP Publishing LLC.

AB - A concentration of Manganese as high as 8% was successfully diluted into Zinc Oxide epitaxial films deposited by pulsed laser deposition. The films showed strong ferromagnetism with a large coercivity. Low temperature X-ray absorption spectroscopy measurements indicated that all the Manganese ions substitute for Zinc sites of the wurtzite lattice in the valency of +2. Photoluminescence measurements excluded the presence of Zinc vacancies, as well as Zn interstitials. All the magnetic moments measured were to ascribe to the formation of bound magnetic polarons, with no other contribution due to Manganese-secondary phases or Zinc vacancy-mediated double exchange interaction. © 2014 AIP Publishing LLC.

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U2 - 10.1063/1.4871759

DO - 10.1063/1.4871759

M3 - RGC 21 - Publication in refereed journal

SN - 0021-8979

VL - 115

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 15

M1 - 153902

ER -

Chemical states and ferromagnetism in heavily Mn-substituted zinc oxide thin films

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