Stabilization of the oxygen concentration in La0.3Sr0.7CoO3−δ
thin films by 3 nm thin LaAlO3 capping layer

J 2022

Stabilization of the oxygen concentration in La0.3Sr0.7CoO3−δ thin films by 3 nm thin LaAlO3 capping layer

KIABA, Michal; Ondřej CAHA; Farzin ABADIZAMAN a Adam DUBROKA

Základní údaje

Originální název

Stabilization of the oxygen concentration in La0.3Sr0.7CoO3−δ thin films by 3 nm thin LaAlO3 capping layer

Autoři

KIABA, Michal (703 Slovensko, garant, domácí); Ondřej CAHA (203 Česká republika, domácí); Farzin ABADIZAMAN (364 Írán, domácí) a Adam DUBROKA (203 Česká republika, domácí)

Vydání

Thin Solid Films, Elsevier B.V. 2022, 0040-6090

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Švýcarsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL URL

Impakt faktor

Impact factor: 2.100

Kód RIV

RIV/00216224:14310/22:00128082

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1016/j.tsf.2022.139438

UT WoS

000869931300002

EID Scopus

2-s2.0-85138044648

Klíčová slova anglicky

Pulsed laser deposition; Lanthanum strontium cobalt oxide; Perovskite; Capping layer; Cobaltates; Oxygen vacancies; Magnetometry; Ozone annealing

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 18. 1. 2023 11:07, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We prepared La0.3Sr0.7CoO3−δ thin films by pulsed laser deposition on (LaAlO3)0.3(Sr2TaAlO6)0.7 substrates with and without a protective LaAlO3 capping layer and investigated their structural and magnetic properties. We observed that, in the uncapped films, the Curie temperature strongly decreased after annealing in helium atmosphere, and it significantly decreased even in samples stored for several weeks at room temperature. The decrease of the Currie temperature is caused by an increase of the concentration of oxygen vacancies, δ. However, we show that already a 3 nm thin LaAlO3 capping layer can essentially conserve δ at room temperature, and it considerably slows down the formation of oxygen vacancies at elevated temperatures.

Návaznosti

EF18_053/0016952, projekt VaV

Název: Postdoc2MUNI

GA20-10377S, projekt VaV

Název: Jevy v heterostrukturách oxidů přechodových kovů vyvolané dopováním a rozhraním (Akronym: TMO Heterostructures)

Investor: Grantová agentura ČR, Jevy v heterostrukturách oxidů přechodových kovů vyvolané dopováním a rozhraním

LQ1601, projekt VaV

Název: CEITEC 2020 (Akronym: CEITEC2020)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, CEITEC 2020

90110, velká výzkumná infrastruktura

Název: CzechNanoLab

Citovat

KIABA, Michal; Ondřej CAHA; Farzin ABADIZAMAN a Adam DUBROKA. Stabilization of the oxygen concentration in La0.3Sr0.7CoO3−δ thin films by 3 nm thin LaAlO3 capping layer. Thin Solid Films. Elsevier B.V., 2022, roč. 759, October, s. 1-5. ISSN 0040-6090. Dostupné z: https://dx.doi.org/10.1016/j.tsf.2022.139438.

@article{2247556,
   author = {Kiaba, Michal and Caha, Ondřej and Abadizaman, Farzin and Dubroka, Adam},
   article_number = {October},
   doi = {http://dx.doi.org/10.1016/j.tsf.2022.139438},
   keywords = {Pulsed laser deposition; Lanthanum strontium cobalt oxide; Perovskite; Capping layer; Cobaltates; Oxygen vacancies; Magnetometry; Ozone annealing},
   language = {eng},
   issn = {0040-6090},
   journal = {Thin Solid Films},
   title = {Stabilization of the oxygen concentration in La0.3Sr0.7CoO3−δ thin films by 3 nm thin LaAlO3 capping layer},
   url = {https://arxiv.org/pdf/2201.04854.pdf},
   volume = {759},
   year = {2022}
}

TY  - JOUR
ID  - 2247556
AU  - Kiaba, Michal - Caha, Ondřej - Abadizaman, Farzin - Dubroka, Adam
PY  - 2022
TI  - Stabilization of the oxygen concentration in La0.3Sr0.7CoO3−δ thin films by 3 nm thin LaAlO3 capping layer
JF  - Thin Solid Films
VL  - 759
IS  - October
SP  - 1-5
EP  - 1-5
PB  - Elsevier B.V.
SN  - 00406090
KW  - Pulsed laser deposition
KW  - Lanthanum strontium cobalt oxide
KW  - Perovskite
KW  - Capping layer
KW  - Cobaltates
KW  - Oxygen vacancies
KW  - Magnetometry
KW  - Ozone annealing
UR  - https://arxiv.org/pdf/2201.04854.pdf
N2  - We prepared La0.3Sr0.7CoO3−δ thin films by pulsed laser deposition on (LaAlO3)0.3(Sr2TaAlO6)0.7 substrates with and without a protective LaAlO3 capping layer and investigated their structural and magnetic properties. We observed that, in the uncapped films, the Curie temperature strongly decreased after annealing in helium atmosphere, and it significantly decreased even in samples stored for several weeks at room temperature. The decrease of the Currie temperature is caused by an increase of the concentration of oxygen vacancies, δ. However, we show that already a 3 nm thin LaAlO3 capping layer can essentially conserve δ at room temperature, and it considerably slows down the formation of oxygen vacancies at elevated temperatures.
ER  -

KIABA, Michal; Ondřej CAHA; Farzin ABADIZAMAN a Adam DUBROKA. Stabilization of the oxygen concentration in La0.3Sr0.7CoO3−δ thin films by 3 nm thin LaAlO3 capping layer. \textit{Thin Solid Films}. Elsevier B.V., 2022, roč.~759, October, s.~1-5. ISSN~0040-6090. Dostupné z: https://dx.doi.org/10.1016/j.tsf.2022.139438.

Přehled o publikaci