Preferential orientation of photochromic gadolinium oxyhydride films

Elbruz Murat Baba; Jose Montero; Dmitrii Moldarev; Marcos Vinicius Moro; Max Wolff; Daniel Primetzhofer; Sabrina Sartori; Esra Zayim; Smagu Karazhanov

doi:10.3390/molecules25143181

Preferential orientation of photochromic gadolinium oxyhydride films

Elbruz Murat Baba^*
, Jose Montero
, Dmitrii Moldarev
, Marcos Vinicius Moro
, Max Wolff
, Daniel Primetzhofer
, Sabrina Sartori
, Esra Zayim
, Smagu Karazhanov

^*Bu çalışma için yazışmadan sorumlu yazar

Fizik Mühendisliği Bölümü

Institute for Energy Technology
Istanbul Technical University
Uppsala University
Moscow Engineering Physics Institute
University of Oslo

Araştırma çıktısı: Dergi yayını › Makale › Hakemli

12 Atıf (Scopus)

Özet

We report preferential orientation control in photochromic gadolinium oxyhydride (GdHO) thin films deposited by a two-step process. Gadolinium hydride (GdH2-x) films were grown by reactive magnetron sputtering, followed by oxidation in air. The preferential orientation, grain size, anion concentrations and photochromic response of the films were strongly dependent on the deposition pressure. The GdHO films showed a preferential orientation along the [100] direction and exhibited photochromism when synthesized at deposition pressures of up to 5.8 Pa. The photochromic contrast was larger than 20% when the films were deposited below 2.8 Pa with a 0.22 H2/Ar flow ratio. We argue that the relation of preferential orientation and the post deposition oxidation since oxygen concentration is known to be a key parameter for photochromism in rare-earth oxyhydride thin films. The experimental observations described above were explained by the decrease of the grain size as a result of the increase of the deposition pressure of the sputtering gas, followed by a higher oxygen incorporation.

Orijinal dil	İngilizce
Makale numarası	3181
Dergi	Molecules
Hacim	25
Basın numarası	14
DOI'lar	https://doi.org/10.3390/molecules25143181
Yayın durumu	Yayınlandı - Tem 2020

Bibliyografik not

Publisher Copyright:
© 2020 by the authors.

Finansman

Funding: The work by IFE team has received funding from the Research Council of Norway through FRINATEK Project No. 287545. Accelerator operation at Uppsala University is supported by the Swedish Research Council VR-RFI (contract No. 2017-00646_9) and the Swedish Foundation for Strategic Research (contract RIF14-0053). Author Contributions: Conceptualization, E.M.B., J.M. and S.K.; methodology, E.M.B. and J.M.; formal analysis, E.M.B., J.M., D.M., M.V.M., M.W., D.P., S.S., E.Z., S.K.; investigation, E.M.B., J.M., D.M., M.V.M., S.K.; resources, S.K.; data curation, E.M.B., D.M., M.V.M.; writing—original draft preparation, E.M.B.; writing—review and editing, E.M.B., J.M., D.M., M.V.M., M.W., D.P., S.S., E.Z., S.K.; visualization, E.M.B., D.M., M.V.M.; supervision, E.Z., S.K.; project administration, S.K.; funding acquisition, S.K. (FRINATEK Project No. 287545 from the Research Council of Norway), D.P. (infrastructural grants from VR-RFI and SSF). All authors have read and agreed to the published version of the manuscript.

Finansörler	Finansör numarası
Swedish Research Council VR-RFI	2017-00646_9
VR-RFI
Stiftelsen för Strategisk Forskning	RIF14-0053
Norges Forskningsråd	287545
Uppsala Universitet
Institute for Future Environments, Queensland University of Technology

Belgeye Erişim

10.3390/molecules25143181

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Preferential orientation of photochromic gadolinium oxyhydride films",

abstract = "We report preferential orientation control in photochromic gadolinium oxyhydride (GdHO) thin films deposited by a two-step process. Gadolinium hydride (GdH2-x) films were grown by reactive magnetron sputtering, followed by oxidation in air. The preferential orientation, grain size, anion concentrations and photochromic response of the films were strongly dependent on the deposition pressure. The GdHO films showed a preferential orientation along the [100] direction and exhibited photochromism when synthesized at deposition pressures of up to 5.8 Pa. The photochromic contrast was larger than 20\% when the films were deposited below 2.8 Pa with a 0.22 H2/Ar flow ratio. We argue that the relation of preferential orientation and the post deposition oxidation since oxygen concentration is known to be a key parameter for photochromism in rare-earth oxyhydride thin films. The experimental observations described above were explained by the decrease of the grain size as a result of the increase of the deposition pressure of the sputtering gas, followed by a higher oxygen incorporation.",

keywords = "Band gap, Gadolinium oxyhydride, Mixed anionmaterials, Photochromic effect, Preferential orientation, Rare earthmetal oxyhydride",

author = "Baba, \{Elbruz Murat\} and Jose Montero and Dmitrii Moldarev and Moro, \{Marcos Vinicius\} and Max Wolff and Daniel Primetzhofer and Sabrina Sartori and Esra Zayim and Smagu Karazhanov",

note = "Publisher Copyright: {\textcopyright} 2020 by the authors.",

year = "2020",

month = jul,

doi = "10.3390/molecules25143181",

language = "English",

volume = "25",

journal = "Molecules",

issn = "1420-3049",

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TY - JOUR

T1 - Preferential orientation of photochromic gadolinium oxyhydride films

AU - Baba, Elbruz Murat

AU - Montero, Jose

AU - Moldarev, Dmitrii

AU - Moro, Marcos Vinicius

AU - Wolff, Max

AU - Primetzhofer, Daniel

AU - Sartori, Sabrina

AU - Zayim, Esra

AU - Karazhanov, Smagu

PY - 2020/7

Y1 - 2020/7

N2 - We report preferential orientation control in photochromic gadolinium oxyhydride (GdHO) thin films deposited by a two-step process. Gadolinium hydride (GdH2-x) films were grown by reactive magnetron sputtering, followed by oxidation in air. The preferential orientation, grain size, anion concentrations and photochromic response of the films were strongly dependent on the deposition pressure. The GdHO films showed a preferential orientation along the [100] direction and exhibited photochromism when synthesized at deposition pressures of up to 5.8 Pa. The photochromic contrast was larger than 20% when the films were deposited below 2.8 Pa with a 0.22 H2/Ar flow ratio. We argue that the relation of preferential orientation and the post deposition oxidation since oxygen concentration is known to be a key parameter for photochromism in rare-earth oxyhydride thin films. The experimental observations described above were explained by the decrease of the grain size as a result of the increase of the deposition pressure of the sputtering gas, followed by a higher oxygen incorporation.

AB - We report preferential orientation control in photochromic gadolinium oxyhydride (GdHO) thin films deposited by a two-step process. Gadolinium hydride (GdH2-x) films were grown by reactive magnetron sputtering, followed by oxidation in air. The preferential orientation, grain size, anion concentrations and photochromic response of the films were strongly dependent on the deposition pressure. The GdHO films showed a preferential orientation along the [100] direction and exhibited photochromism when synthesized at deposition pressures of up to 5.8 Pa. The photochromic contrast was larger than 20% when the films were deposited below 2.8 Pa with a 0.22 H2/Ar flow ratio. We argue that the relation of preferential orientation and the post deposition oxidation since oxygen concentration is known to be a key parameter for photochromism in rare-earth oxyhydride thin films. The experimental observations described above were explained by the decrease of the grain size as a result of the increase of the deposition pressure of the sputtering gas, followed by a higher oxygen incorporation.

KW - Band gap

KW - Gadolinium oxyhydride

KW - Mixed anionmaterials

KW - Photochromic effect

KW - Preferential orientation

KW - Rare earthmetal oxyhydride

UR - https://www.scopus.com/pages/publications/85088027408

U2 - 10.3390/molecules25143181

DO - 10.3390/molecules25143181

M3 - Article

C2 - 32664654

AN - SCOPUS:85088027408

SN - 1420-3049

VL - 25

JO - Molecules

JF - Molecules

IS - 14

M1 - 3181

ER -

Preferential orientation of photochromic gadolinium oxyhydride films

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