Pristine SnO2 thin films: origins of high curie temperature

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00142296" target="_blank" >RIV/00216224:14310/25:00142296 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s00339-025-09031-7" target="_blank" >https://doi.org/10.1007/s00339-025-09031-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00339-025-09031-7" target="_blank" >10.1007/s00339-025-09031-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pristine SnO2 thin films: origins of high curie temperature

Popis výsledku v původním jazyce

We investigate the origin of ferromagnetism (FM) and the exceptionally high Curie temperature (TC) in undoped SnO2 films. Ultra-thin SnO2 films were found to exhibit significant FM, while thicker films show a diamagnetic behavior. Structural and chemical analyses reveal a variation in oxygen vacancy concentrations between thin and thick films. Notably, an exceptionally high TC exceeding 800 K is observed for the first time. XPS and XAS analyses reveal the presence of oxygen and tin vacancies, which might play a crucial role in the observed magnetism. Theoretically, it was supposed that oxygen vacancies play a crucial role in the FM of SnO2 films. However, the experimentally observed TC surpasses the predicted 505 K, suggesting additional contributing factors. This suggests that both oxygen and tin defects might contribute to the total magnetic moment. The findings highlight the key role of defect-induced magnetism in SnO2 thin films and provide insights into the fundamental mechanism driving high- TC FM in undoped oxide semiconductors.

Název v anglickém jazyce

Pristine SnO2 thin films: origins of high curie temperature

Popis výsledku anglicky

We investigate the origin of ferromagnetism (FM) and the exceptionally high Curie temperature (TC) in undoped SnO2 films. Ultra-thin SnO2 films were found to exhibit significant FM, while thicker films show a diamagnetic behavior. Structural and chemical analyses reveal a variation in oxygen vacancy concentrations between thin and thick films. Notably, an exceptionally high TC exceeding 800 K is observed for the first time. XPS and XAS analyses reveal the presence of oxygen and tin vacancies, which might play a crucial role in the observed magnetism. Theoretically, it was supposed that oxygen vacancies play a crucial role in the FM of SnO2 films. However, the experimentally observed TC surpasses the predicted 505 K, suggesting additional contributing factors. This suggests that both oxygen and tin defects might contribute to the total magnetic moment. The findings highlight the key role of defect-induced magnetism in SnO2 thin films and provide insights into the fundamental mechanism driving high- TC FM in undoped oxide semiconductors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Physics A

ISSN

0947-8396

e-ISSN

1432-0630

Svazek periodika

131

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

852

Kód UT WoS článku

001594699300014

EID výsledku v databázi Scopus

2-s2.0-105018907540