Phase Transitions at the Mn/ZnO (000(1)over-bar) Interface Probed by High Energy X-ray Spectroscopies

Mac C. Mugumaoderha; Robert Sporken; Jacques Ghijsen; Frank M. F. de Groot; Jacques A. Dumont

doi:10.1021/jp206705p

Phase Transitions at the Mn/ZnO (000(1)over-bar) Interface Probed by High Energy X-ray Spectroscopies

Mac C. Mugumaoderha^*
, Robert Sporken
, Jacques Ghijsen
, Frank M. F. de Groot
, Jacques A. Dumont

^*Corresponding author for this work

Universite de Namur

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Phase transitions occurring at the Mn/ZnO interface upon annealing are probed in situ by high-energy X-ray: photoelectron and absorption spectroscopies. A thin Mn film (similar to 1 nm) is grown on the (000 (1) over bar) surface of a ZnO single crystal. Upon annealing to progressively higher temperature ranging from 575 to 800 K, various Mn phases form successively. At first, the Mn film oxidizes and a MnO layer forms on top of the surface. Then, while Mn atoms diffuse deeper into the bulk of ZnO, ZnyMn3-yO4 starts to form. Finally, at the highest annealing temperature, Mn appears to be substitutionally diluted at Zn sites within the ZnO lattice.

Original language	English
Pages (from-to)	665-670
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	1
DOIs	https://doi.org/10.1021/jp206705p
Publication status	Published - 12 Jan 2012

Funding

We thank C. Moisson (NOVASiC), for the MCP polishing of and providing the ZnO single crystals. We would like to thank Heiko Schulz-Ritter, Sebastian Thiess, and Wolfgang Drube for excellent technical and experimental support at the beamline BW2 at DESY (Deutsches Elektronen-Synchrotron). This work was supported by CERUNA-University of Namur, Belgian National Fund for Scientific Research (F.S.R-FNRS), DESY and the European Commission under contract RII3-CT 2004-506008 (IA-SFS).

Keywords

K-EDGE XANES
PHOTOELECTRON-SPECTROSCOPY
PHOTOEMISSION SPECTRA
METAL COMPOUNDS
MN
SPECIATION
MANGANESE
SURFACE
FILMS

Access to Document

10.1021/jp206705p

Jp206705p
Open Access (free)
Final published version, 2.91 MB

Cite this

@article{b47e92ae1bc743c2be89232b1ede232d,

title = "Phase Transitions at the Mn/ZnO (000(1)over-bar) Interface Probed by High Energy X-ray Spectroscopies",

abstract = "Phase transitions occurring at the Mn/ZnO interface upon annealing are probed in situ by high-energy X-ray: photoelectron and absorption spectroscopies. A thin Mn film (similar to 1 nm) is grown on the (000 (1) over bar) surface of a ZnO single crystal. Upon annealing to progressively higher temperature ranging from 575 to 800 K, various Mn phases form successively. At first, the Mn film oxidizes and a MnO layer forms on top of the surface. Then, while Mn atoms diffuse deeper into the bulk of ZnO, ZnyMn3-yO4 starts to form. Finally, at the highest annealing temperature, Mn appears to be substitutionally diluted at Zn sites within the ZnO lattice.",

keywords = "K-EDGE XANES, PHOTOELECTRON-SPECTROSCOPY, PHOTOEMISSION SPECTRA, METAL COMPOUNDS, MN, SPECIATION, MANGANESE, SURFACE, FILMS",

author = "Mugumaoderha, \{Mac C.\} and Robert Sporken and Jacques Ghijsen and \{de Groot\}, \{Frank M. F.\} and Dumont, \{Jacques A.\}",

year = "2012",

month = jan,

day = "12",

doi = "10.1021/jp206705p",

language = "English",

volume = "116",

pages = "665--670",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "1",

}

TY - JOUR

T1 - Phase Transitions at the Mn/ZnO (000(1)over-bar) Interface Probed by High Energy X-ray Spectroscopies

AU - Mugumaoderha, Mac C.

AU - Sporken, Robert

AU - Ghijsen, Jacques

AU - de Groot, Frank M. F.

AU - Dumont, Jacques A.

PY - 2012/1/12

Y1 - 2012/1/12

N2 - Phase transitions occurring at the Mn/ZnO interface upon annealing are probed in situ by high-energy X-ray: photoelectron and absorption spectroscopies. A thin Mn film (similar to 1 nm) is grown on the (000 (1) over bar) surface of a ZnO single crystal. Upon annealing to progressively higher temperature ranging from 575 to 800 K, various Mn phases form successively. At first, the Mn film oxidizes and a MnO layer forms on top of the surface. Then, while Mn atoms diffuse deeper into the bulk of ZnO, ZnyMn3-yO4 starts to form. Finally, at the highest annealing temperature, Mn appears to be substitutionally diluted at Zn sites within the ZnO lattice.

AB - Phase transitions occurring at the Mn/ZnO interface upon annealing are probed in situ by high-energy X-ray: photoelectron and absorption spectroscopies. A thin Mn film (similar to 1 nm) is grown on the (000 (1) over bar) surface of a ZnO single crystal. Upon annealing to progressively higher temperature ranging from 575 to 800 K, various Mn phases form successively. At first, the Mn film oxidizes and a MnO layer forms on top of the surface. Then, while Mn atoms diffuse deeper into the bulk of ZnO, ZnyMn3-yO4 starts to form. Finally, at the highest annealing temperature, Mn appears to be substitutionally diluted at Zn sites within the ZnO lattice.

KW - K-EDGE XANES

KW - PHOTOELECTRON-SPECTROSCOPY

KW - PHOTOEMISSION SPECTRA

KW - METAL COMPOUNDS

KW - MN

KW - SPECIATION

KW - MANGANESE

KW - SURFACE

KW - FILMS

U2 - 10.1021/jp206705p

DO - 10.1021/jp206705p

M3 - Article

SN - 1932-7447

VL - 116

SP - 665

EP - 670

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 1

ER -

Phase Transitions at the Mn/ZnO (000(1)over-bar) Interface Probed by High Energy X-ray Spectroscopies

Abstract

Funding

Keywords

Access to Document

Fingerprint

Cite this