Dual Ferroelectric Polarization and Dielectric Response Improvement in Epitaxial Hf0.5Zr0.5O2/HfO2 Nanolaminates

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2025-01-01 DOI:10.1021/acsami.4c15867

Mehrdad Ghiasabadi Farahani, Alberto Quintana, Tingfeng Song, Rohit Kumar, Andrea Rubano, Faizan Ali, Florencio Sánchez, Ignasi Fina

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Abstract

Nanolaminates based on ferroelectric polycrystalline doped HfO₂ have gained interest because those compounds show enhanced functional properties. Here, we achieve coexisting improvement of remanent polarization and dielectric permittivity in wake-up-free epitaxial Hf_0.5Zr_0.5O₂/HfO₂ nanolaminates with different numbers of HfO₂ nanolayers if compared with Hf_0.5Zr_0.5O₂ single films of equivalent thickness or other reported polycrystalline nanolaminates. Comprehensive structural characterization reveals that the origin of the enhancement must be the larger amount of the orthorhombic phase in the nanolaminates. The retention of nanolaminates is greater than that of Hf_0.5Zr_0.5O₂ single films; however, fatigue is larger and ferroelectric switching is slower in the nanolaminates compared with single layers. The present work reveals nanolamination in high-quality films as a strategy to increase dielectric permittivity without important degradation of other functional properties.

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.