Rhombohedral R3 Phase of Mn-Doped Hf0.5Zr0.5O2 Epitaxial Films with Robust Ferroelectricity.
Adv Mater
; : e2406038, 2024 Oct 09.
Article
em En
| MEDLINE
| ID: mdl-39380399
ABSTRACT
HfO2-based ferroelectric materials are emerging as key components for next-generation nanoscale devices, owing to their exceptional nanoscale properties and compatibility with established silicon-based electronics infrastructure. Despite the considerable attention garnered by the ferroelectric orthorhombic phase, the polar rhombohedral phase has remained relatively unexplored due to the inherent challenges in its stabilization. In this study, the successful synthesis of a distinct ferroelectric rhombohedral phase is reported, i.e., the R3 phase, in Mn-doped Hf0.5Zr0.5O2 (HZM) epitaxial thin films, which stands different from the conventional Pca21 and R3m polar phases. These findings reveal that this R3 phase HZM film exhibits a remnant polarization of up to 47 µC cm- 2 at room temperature, along with an exceptional retention capability projected to exceed a decade and an endurance surpassing 109 cycles. Moreover, it is demonstrated that by modulating the concentration of Mn dopant and the film's thickness, it is possible to selectively control the phase transition between the R3, R3m, and Pca21 polar phases. This research not only sheds new light on the ferroelectricity of the HfO2 system but also paves the way for innovative strategies to manipulate ferroelectric properties for enhanced device performance.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Adv Mater
/
Adv. mater. (Weinheim Print)
/
Advanced materials (Weinheim Print)
Assunto da revista:
BIOFISICA
/
QUIMICA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
China
País de publicação:
Alemanha