2D nature of magnetic states at SnO2 surfaces: a combined experimental and theoretical study

Logo poskytovatele

Varování

Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
Autoři

NGUYEN Hoa Hong FRIÁK Martin PAZOUREK Petr PHAM Sy Nguyen TRAN Quynh Nhu Thi KIABA Michal GAZDOVÁ Kristýna PAVLŮ Jana

Rok publikování 2024
Druh Článek v odborném periodiku
Časopis / Zdroj RSC Advances
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://pubs.rsc.org/en/content/articlelanding/2024/ra/d4ra00734d
Doi http://dx.doi.org/10.1039/d4ra00734d
Klíčová slova 2D; nanomaterials; ferromagnetism; magnetic semiconductors; defects
Popis 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.
Související projekty:

Používáte starou verzi internetového prohlížeče. Doporučujeme aktualizovat Váš prohlížeč na nejnovější verzi.