Preferential Orientation of Photochromic Gadolinium Oxyhydride Films

Baba, Elbruz MuratInst Energy Technol, Dept Solar Energy, NO-2027 Kjeller, Norway.;Istanbul Tech Univ, Nanosci & Nano Engn Dept, TR-34469 Istanbul, Turkey. (författare)

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 H-2/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.

Montero, José Amenedo,1983-Uppsala universitet,Fasta tillståndets fysik(Swepub:uu)josmo456 (författare)
Moldarev, DmitriiUppsala universitet,Materialfysik,Inst En MEPhI, Dept Mat Sci, Kashirskoe Shosse 31, Moscow 115409, Russia.(Swepub:uu)dmimo602 (författare)
Moro, Marcos V.Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)marmo488 (författare)
Wolff, MaxUppsala universitet,Materialfysik,Natl Res Nucl Univ MEPhI, Dept Mat Sci, Kashirskoe Shosse 31, Moscow 115409, Russia.(Swepub:uu)maxwo643 (författare)
Primetzhofer, DanielUppsala universitet,Tillämpad kärnfysik(Swepub:uu)danpr521 (författare)
Sartori, SabrinaUniv Oslo, Dept Technol Syst, NO-2027 Kjeller, Norway. (författare)
Zayim, EsraIstanbul Tech Univ, Nanosci & Nano Engn Dept, TR-34469 Istanbul, Turkey.;Istanbul Tech Univ, Fac Sci & Letters, Phys Engn Dept, TR-34469 Istanbul, Turkey. (författare)
Karazhanov, SmagulInst Energy Technol, Dept Solar Energy, NO-2027 Kjeller, Norway.;Natl Res Nucl Univ MEPhI, Dept Mat Sci, Kashirskoe Shosse 31, Moscow 115409, Russia. (författare)
Inst Energy Technol, Dept Solar Energy, NO-2027 Kjeller, Norway.;Istanbul Tech Univ, Nanosci & Nano Engn Dept, TR-34469 Istanbul, Turkey.Fasta tillståndets fysik (creator_code:org_t)

Av författaren/redakt...: Baba, Elbruz Mur ...; Montero, José Am ...; Moldarev, Dmitri ...; Moro, Marcos V.; Wolff, Max; Primetzhofer, Da ...; visa fler...; Sartori, Sabrina; Zayim, Esra; Karazhanov, Smag ...; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.