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 and Adam DUBROKA

Basic information

Original name

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

Authors

KIABA, Michal (703 Slovakia, guarantor, belonging to the institution), Ondřej CAHA (203 Czech Republic, belonging to the institution), Farzin ABADIZAMAN (364 Islamic Republic of Iran, belonging to the institution) and Adam DUBROKA (203 Czech Republic, belonging to the institution)

Edition

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

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10302 Condensed matter physics

Country of publisher

Switzerland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL URL

Impact factor

Impact factor: 2.100

RIV identification code

RIV/00216224:14310/22:00128082

Organization unit

Faculty of Science

DOI

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

UT WoS

000869931300002

Keywords in English

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

Abstract

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.

Links

EF18_053/0016952, research and development project

Name: Postdoc2MUNI

GA20-10377S, research and development project

Name: Jevy v heterostrukturách oxidů přechodových kovů vyvolané dopováním a rozhraním (Acronym: TMO Heterostructures)

Investor: Czech Science Foundation

LQ1601, research and development project

Name: CEITEC 2020 (Acronym: CEITEC2020)

Investor: Ministry of Education, Youth and Sports of the CR

90110, large research infrastructures

Name: CzechNanoLab

Citovat

KIABA, Michal, Ondřej CAHA, Farzin ABADIZAMAN and 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, vol. 759, October, p. 1-5. ISSN 0040-6090. Available from: 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 and 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, vol.~759, October, p.~1-5. ISSN~0040-6090. Available from: https://dx.doi.org/10.1016/j.tsf.2022.139438.

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