57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

Standard

57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering. / Qi, B.; Gunnlaugsson, H.P.; Mokhles Gerami, A.; Gislason, H.P.; Ólafsson, S.; Magnus, F.; Mølholt, Torben Esmann; Masenda, H.; Tarazaga Martín-Lueugo, A.; Bonanni, A.; Krastev, P.B.; Masondo, V.; Unzueta, I.; Bharuth-Ram, K.; Johnston, K.; Naidoo, D.; Schell, J.; Schaaf, P.

In: Applied Surface Science, Vol. 464, 2019, p. 682-691.

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

Harvard

Qi, B, Gunnlaugsson, HP, Mokhles Gerami, A, Gislason, HP, Ólafsson, S, Magnus, F, Mølholt, TE, Masenda, H, Tarazaga Martín-Lueugo, A, Bonanni, A, Krastev, PB, Masondo, V, Unzueta, I, Bharuth-Ram, K, Johnston, K, Naidoo, D, Schell, J & Schaaf, P 2019, '57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering', Applied Surface Science, vol. 464, pp. 682-691. https://doi.org/10.1016/j.apsusc.2018.09.107

APA

Qi, B., Gunnlaugsson, H. P., Mokhles Gerami, A., Gislason, H. P., Ólafsson, S., Magnus, F., ... Schaaf, P. (2019). 57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering. Applied Surface Science, 464, 682-691. https://doi.org/10.1016/j.apsusc.2018.09.107

CBE

Qi B, Gunnlaugsson HP, Mokhles Gerami A, Gislason HP, Ólafsson S, Magnus F, Mølholt TE, Masenda H, Tarazaga Martín-Lueugo A, Bonanni A, Krastev PB, Masondo V, Unzueta I, Bharuth-Ram K, Johnston K, Naidoo D, Schell J, Schaaf P. 2019. 57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering. Applied Surface Science. 464:682-691. https://doi.org/10.1016/j.apsusc.2018.09.107

MLA

Vancouver

Qi B, Gunnlaugsson HP, Mokhles Gerami A, Gislason HP, Ólafsson S, Magnus F et al. 57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering. Applied Surface Science. 2019;464:682-691. https://doi.org/10.1016/j.apsusc.2018.09.107

Author

Qi, B. ; Gunnlaugsson, H.P. ; Mokhles Gerami, A. ; Gislason, H.P. ; Ólafsson, S. ; Magnus, F. ; Mølholt, Torben Esmann ; Masenda, H. ; Tarazaga Martín-Lueugo, A. ; Bonanni, A. ; Krastev, P.B. ; Masondo, V. ; Unzueta, I. ; Bharuth-Ram, K. ; Johnston, K. ; Naidoo, D. ; Schell, J. ; Schaaf, P. / 57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering. In: Applied Surface Science. 2019 ; Vol. 464. pp. 682-691.

Bibtex

@article{f7f2da664e384d78a1a943515abb485b,
title = "57Fe M{\"o}ssbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering",
abstract = "The properties and performance of TiN thin films are closely related to the concentration and mobility of lattice defects in the thin film structures of TiN. This makes a local atomic scale study of TiN thin films an ever-growing demand. Emission 57Fe M{\"o}ssbauer spectroscopy (eMS) is a powerful tool in this regard, which we apply here to study an ultrathin TiN film epitaxially grown on MgO (100). With the help of theoretical calculations, our results show that most implanted Fe ions adopt a 2+ valence state and locate at the Ti sublattice in the bulk-like single crystalline grains, with the rest Fe residing at the grain boundaries as interstitials. A small percentage of nitrogen point defects (vacancy VN and interstitial NI) are observed in the bulk-like crystalline grains. A temperature-dependent, interstitial NI mediated site-exchange between NI and VN inside the crystal grain are deduced via a N2 dimmer like diffusion of NI through the crystal grains in the temperature range of 540 - 620 K. This is interesting in the perspective of exploring the catalytic property of TiN nanostructures. The titanium vacancy (VTi) is only detected at the grain boundaries. Annealing up to 813 K, both the VN and NI are annihilated in the crystalline grains and the VTi is fully recovered with healing of the grain boundaries. However, no evidence of ferromagnetism due to dilute implantation of 57Mn/57Fe and or structural defects in the film is obtained. This suggests that the so far reported dilute magnetism and defect-induced ferromagnetism in TiN nanostructures requires a further systematic investigation.",
keywords = "M{\"o}ssbauer spectroscopy, Epitaxial thin film, Defects",
author = "B. Qi and H.P. Gunnlaugsson and {Mokhles Gerami}, A. and H.P. Gislason and S. {\'O}lafsson and F. Magnus and M{\o}lholt, {Torben Esmann} and H. Masenda and {Tarazaga Mart{\'i}n-Lueugo}, A. and A. Bonanni and P.B. Krastev and V. Masondo and I. Unzueta and K. Bharuth-Ram and K. Johnston and D. Naidoo and J. Schell and P. Schaaf",
year = "2019",
doi = "10.1016/j.apsusc.2018.09.107",
language = "English",
volume = "464",
pages = "682--691",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier BV * North-Holland",

}

RIS

TY - JOUR

T1 - 57Fe Mössbauer study of epitaxial TiN thin film grown on MgO(100) by magnetron sputtering

AU - Qi, B.

AU - Gunnlaugsson, H.P.

AU - Mokhles Gerami, A.

AU - Gislason, H.P.

AU - Ólafsson, S.

AU - Magnus, F.

AU - Mølholt, Torben Esmann

AU - Masenda, H.

AU - Tarazaga Martín-Lueugo, A.

AU - Bonanni, A.

AU - Krastev, P.B.

AU - Masondo, V.

AU - Unzueta, I.

AU - Bharuth-Ram, K.

AU - Johnston, K.

AU - Naidoo, D.

AU - Schell, J.

AU - Schaaf, P.

PY - 2019

Y1 - 2019

N2 - The properties and performance of TiN thin films are closely related to the concentration and mobility of lattice defects in the thin film structures of TiN. This makes a local atomic scale study of TiN thin films an ever-growing demand. Emission 57Fe Mössbauer spectroscopy (eMS) is a powerful tool in this regard, which we apply here to study an ultrathin TiN film epitaxially grown on MgO (100). With the help of theoretical calculations, our results show that most implanted Fe ions adopt a 2+ valence state and locate at the Ti sublattice in the bulk-like single crystalline grains, with the rest Fe residing at the grain boundaries as interstitials. A small percentage of nitrogen point defects (vacancy VN and interstitial NI) are observed in the bulk-like crystalline grains. A temperature-dependent, interstitial NI mediated site-exchange between NI and VN inside the crystal grain are deduced via a N2 dimmer like diffusion of NI through the crystal grains in the temperature range of 540 - 620 K. This is interesting in the perspective of exploring the catalytic property of TiN nanostructures. The titanium vacancy (VTi) is only detected at the grain boundaries. Annealing up to 813 K, both the VN and NI are annihilated in the crystalline grains and the VTi is fully recovered with healing of the grain boundaries. However, no evidence of ferromagnetism due to dilute implantation of 57Mn/57Fe and or structural defects in the film is obtained. This suggests that the so far reported dilute magnetism and defect-induced ferromagnetism in TiN nanostructures requires a further systematic investigation.

AB - The properties and performance of TiN thin films are closely related to the concentration and mobility of lattice defects in the thin film structures of TiN. This makes a local atomic scale study of TiN thin films an ever-growing demand. Emission 57Fe Mössbauer spectroscopy (eMS) is a powerful tool in this regard, which we apply here to study an ultrathin TiN film epitaxially grown on MgO (100). With the help of theoretical calculations, our results show that most implanted Fe ions adopt a 2+ valence state and locate at the Ti sublattice in the bulk-like single crystalline grains, with the rest Fe residing at the grain boundaries as interstitials. A small percentage of nitrogen point defects (vacancy VN and interstitial NI) are observed in the bulk-like crystalline grains. A temperature-dependent, interstitial NI mediated site-exchange between NI and VN inside the crystal grain are deduced via a N2 dimmer like diffusion of NI through the crystal grains in the temperature range of 540 - 620 K. This is interesting in the perspective of exploring the catalytic property of TiN nanostructures. The titanium vacancy (VTi) is only detected at the grain boundaries. Annealing up to 813 K, both the VN and NI are annihilated in the crystalline grains and the VTi is fully recovered with healing of the grain boundaries. However, no evidence of ferromagnetism due to dilute implantation of 57Mn/57Fe and or structural defects in the film is obtained. This suggests that the so far reported dilute magnetism and defect-induced ferromagnetism in TiN nanostructures requires a further systematic investigation.

KW - Mössbauer spectroscopy

KW - Epitaxial thin film

KW - Defects

U2 - 10.1016/j.apsusc.2018.09.107

DO - 10.1016/j.apsusc.2018.09.107

M3 - Journal article

VL - 464

SP - 682

EP - 691

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -