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@article{2396997,
author = {NGUYEN, Hoa Hong and Friák, Martin and Pazourek, Petr and Pham, Sy Nguyen and Tran, Quynh Nhu Thi and Kiaba, Michal and Gazdová, Kristýna and Pavlů, Jana},
article_number = {19},
doi = {http://dx.doi.org/10.1039/d4ra00734d},
keywords = {2D; nanomaterials; ferromagnetism; magnetic semiconductors; defects},
language = {eng},
issn = {2046-2069},
journal = {RSC Advances},
title = {2D nature of magnetic states at SnO2 surfaces: a combined experimental and theoretical study},
url = {https://pubs.rsc.org/en/content/articlelanding/2024/ra/d4ra00734d},
volume = {14},
year = {2024}
}
TY - JOUR
ID - 2396997
AU - NGUYEN, Hoa Hong - Friák, Martin - Pazourek, Petr - Pham, Sy Nguyen - Tran, Quynh Nhu Thi - Kiaba, Michal - Gazdová, Kristýna - Pavlů, Jana
PY - 2024
TI - 2D nature of magnetic states at SnO2 surfaces: a combined experimental and theoretical study
JF - RSC Advances
VL - 14
IS - 19
SP - 13583-13590
EP - 13583-13590
PB - Royal Society of Chemistry
SN - 20462069
KW - 2D
KW - nanomaterials
KW - ferromagnetism
KW - magnetic semiconductors
KW - defects
UR - https://pubs.rsc.org/en/content/articlelanding/2024/ra/d4ra00734d
N2 - For undoped SnO2, room temperature ferromagnetism could be seen uniquely in 2-dimensional configurations, particularly in ultra-thin films (whose thickness is ideally below 100 nm). Both bulk samples and nano-powders of pristine SnO2 are diamagnetic, indicating that a 2D surface is a key point in shaping up the magnetic properties in SnO2. As a complement to our experiments, we have performed a series of quantum-mechanical calculations for the bulk rutile-structure SnO2 as well as its (001) and (101) surfaces. The calculations included several atomic configurations with and without vacancies in/under the studied surfaces. The stability of the non-magnetic ground state of rutile SnO2 bulk was cross-checked and confirmed by its phonon spectrum computed within the harmonic approximation. Regarding the surfaces, the bulk-like (001) surface containing Sn vacancies has turned out to be ferromagnetic, while the shift of Sn vacancies under the surface resulted in a more complex ferrimagnetic state. The bulk-like (001) surface without vacancies and that with the O vacancies are predicted to be non-magnetic. Regarding the (101) surfaces, those terminated by a single layer of oxygen atoms and those terminated by tin atoms are non-magnetic, while a surface terminated by two layers of oxygen has turned out to be ferromagnetic.
ER -
NGUYEN, Hoa Hong, Martin FRIÁK, Petr PAZOUREK, Sy Nguyen PHAM, Quynh Nhu Thi TRAN, Michal KIABA, Kristýna GAZDOVÁ and Jana PAVLŮ. 2D nature of magnetic states at SnO2 surfaces: a combined experimental and theoretical study. \textit{RSC Advances}. Royal Society of Chemistry, 2024, vol.~14, No~19, p.~13583-13590. ISSN~2046-2069. Available from: https://dx.doi.org/10.1039/d4ra00734d.
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