Lattice locations and properties of Fe in Co/Fe co-implanted ZnO

H. P. Gunnlaugsson; K. Johnston; T. E. Mlholt; G. Weyer; R. Mantovan; H. Masenda; D. Naidoo; S. Ólafsson; K. Bharuth-Ram; H. P. Gíslason; G. Langouche; M. B. Madsen

doi:10.1063/1.3679692

Lattice locations and properties of Fe in Co/Fe co-implanted ZnO

H. P. Gunnlaugsson, K. Johnston, T. E. Mlholt, G. Weyer, R. Mantovan, H. Masenda, D. Naidoo, S. Ólafsson, K. Bharuth-Ram, H. P. Gíslason, G. Langouche, M. B. Madsen

Science Institute

University of Iceland

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

Abstract

The lattice locations and electronic configurations of Fe in ⁵⁷Co/ ⁵⁷Fe implanted ZnO (to (5-6) × 10 ¹⁴ Fe/cm ^-2) have been studied by ⁵⁷Fe Mössbauer emission spectroscopy. The spectra acquired upon room temperature implantation show ∼20 of the probe atoms as Fe ² on perturbed Zn sites and the remaining fraction as Fe ²⁺ in damage sites of interstitial character. After annealing at 773 K, ∼20 remain on crystalline sites, while the damage fraction has partly disappeared and instead a ∼30 fraction occurs as high-spin Fe ³⁺, presumably in precipitates. This suggests that precipitation of Co/Fe in ZnO likely takes place at relatively low temperatures, thus explaining some of the discrepancies in the literature regarding magnetic properties of 3d metal-doped ZnO.

Original language	English
Article number	042109
Journal	Applied Physics Letters
Volume	100
Issue number	4
DOIs	https://doi.org/10.1063/1.3679692
Publication status	Published - 23 Jan 2012

Bibliographical note

Funding Information: This work was supported by the European Union 7th Framework through ENSAR. K. Bharuth‐Ram, H. Masenda, and D. Naidoo acknowledge support from the South African National Research Foundation. T. E. Mølholt acknowledges support from the Icelandic Research Fund. Financial support of the German BMBF Contract No. 05KK4TS1/9 is also gratefully acknowledged.

Access to Document

10.1063/1.3679692

Cite this

@article{9653a3a9588545d89a588af249c10334,

title = "Lattice locations and properties of Fe in Co/Fe co-implanted ZnO",

abstract = "The lattice locations and electronic configurations of Fe in 57Co/ 57Fe implanted ZnO (to (5-6) × 10 14 Fe/cm -2) have been studied by 57Fe M{\"o}ssbauer emission spectroscopy. The spectra acquired upon room temperature implantation show ∼20 of the probe atoms as Fe 2 on perturbed Zn sites and the remaining fraction as Fe 2+ in damage sites of interstitial character. After annealing at 773 K, ∼20 remain on crystalline sites, while the damage fraction has partly disappeared and instead a ∼30 fraction occurs as high-spin Fe 3+, presumably in precipitates. This suggests that precipitation of Co/Fe in ZnO likely takes place at relatively low temperatures, thus explaining some of the discrepancies in the literature regarding magnetic properties of 3d metal-doped ZnO.",

author = "Gunnlaugsson, \{H. P.\} and K. Johnston and Mlholt, \{T. E.\} and G. Weyer and R. Mantovan and H. Masenda and D. Naidoo and S. {\'O}lafsson and K. Bharuth-Ram and G{\'i}slason, \{H. P.\} and G. Langouche and Madsen, \{M. B.\}",

note = "Funding Information: This work was supported by the European Union 7th Framework through ENSAR. K. Bharuth‐Ram, H. Masenda, and D. Naidoo acknowledge support from the South African National Research Foundation. T. E. M{\o}lholt acknowledges support from the Icelandic Research Fund. Financial support of the German BMBF Contract No. 05KK4TS1/9 is also gratefully acknowledged.",

year = "2012",

month = jan,

day = "23",

doi = "10.1063/1.3679692",

language = "English",

volume = "100",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "4",

}

TY - JOUR

T1 - Lattice locations and properties of Fe in Co/Fe co-implanted ZnO

AU - Gunnlaugsson, H. P.

AU - Johnston, K.

AU - Mlholt, T. E.

AU - Weyer, G.

AU - Mantovan, R.

AU - Masenda, H.

AU - Naidoo, D.

AU - Ólafsson, S.

AU - Bharuth-Ram, K.

AU - Gíslason, H. P.

AU - Langouche, G.

AU - Madsen, M. B.

N1 - Funding Information: This work was supported by the European Union 7th Framework through ENSAR. K. Bharuth‐Ram, H. Masenda, and D. Naidoo acknowledge support from the South African National Research Foundation. T. E. Mølholt acknowledges support from the Icelandic Research Fund. Financial support of the German BMBF Contract No. 05KK4TS1/9 is also gratefully acknowledged.

PY - 2012/1/23

Y1 - 2012/1/23

N2 - The lattice locations and electronic configurations of Fe in 57Co/ 57Fe implanted ZnO (to (5-6) × 10 14 Fe/cm -2) have been studied by 57Fe Mössbauer emission spectroscopy. The spectra acquired upon room temperature implantation show ∼20 of the probe atoms as Fe 2 on perturbed Zn sites and the remaining fraction as Fe 2+ in damage sites of interstitial character. After annealing at 773 K, ∼20 remain on crystalline sites, while the damage fraction has partly disappeared and instead a ∼30 fraction occurs as high-spin Fe 3+, presumably in precipitates. This suggests that precipitation of Co/Fe in ZnO likely takes place at relatively low temperatures, thus explaining some of the discrepancies in the literature regarding magnetic properties of 3d metal-doped ZnO.

AB - The lattice locations and electronic configurations of Fe in 57Co/ 57Fe implanted ZnO (to (5-6) × 10 14 Fe/cm -2) have been studied by 57Fe Mössbauer emission spectroscopy. The spectra acquired upon room temperature implantation show ∼20 of the probe atoms as Fe 2 on perturbed Zn sites and the remaining fraction as Fe 2+ in damage sites of interstitial character. After annealing at 773 K, ∼20 remain on crystalline sites, while the damage fraction has partly disappeared and instead a ∼30 fraction occurs as high-spin Fe 3+, presumably in precipitates. This suggests that precipitation of Co/Fe in ZnO likely takes place at relatively low temperatures, thus explaining some of the discrepancies in the literature regarding magnetic properties of 3d metal-doped ZnO.

UR - https://www.scopus.com/pages/publications/84856507315

U2 - 10.1063/1.3679692

DO - 10.1063/1.3679692

M3 - Article

SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

M1 - 042109

ER -

Lattice locations and properties of Fe in Co/Fe co-implanted ZnO

Abstract

Bibliographical note

Access to Document

Fingerprint

Cite this