具有三相结构的 Pb0.97La0.02(Hf0.92Ti0.08)O3 反铁电陶瓷中与温度相关的电致发光性能

IF 3.5 2区 物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2024-11-25 DOI:10.1063/5.0245821
Mengjiao Yu, Dandan Wu, Changshun Dai, Mingsheng Long, Lei Shan, Chunchang Wang, Feng Li
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引用次数: 0

摘要

反铁电(AFE)材料中的反铁电-铁电相变通常会引发高性能电致发光效应(ECE),以 PbZrO3 基 AFE 为代表。作为 PbZrO3 的同素异形结构,PbHfO3 基 AFE 陶瓷中的电致发光研究被严重忽略。本研究探索了具有典型 AFE 特性的 Pb0.97La0.02(Hf0.92Ti0.08)O3 的温度依赖性电致发光性能,并发现随着温度的升高,会诱导出斜方体铁电体(FER)、AFE1(A1,Pbam)和 AFE2(A2,Imma)三相。这导致在温度∼20 °C和∼100 °C时分别出现 FER-to-A1 和 A1-to-A2 的双共存区,并在此产生局部 EC 最大值,ΔT ∼0.06 K 和 ΔT ∼0.16 K(E = 70 kV/cm)。原位 X 射线衍射仪、AFE 电性能和拉曼光谱分析的综合特性证明了这一点。这有力地表明,除了对 FE-准电和 AFE-准电调制策略的传统理解之外,AFE(Pbam)-到 AFE(Imma)相变可以有效地优化基于 PbHfO3 的 AFE 中的 ECE。这项工作不仅展示了基于 PbHfO3 的 AFE 在固态冷却应用中的潜力,还为进一步寻求高 ECE AFE 材料起到了催化作用。
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Temperature dependent electrocaloric performances in Pb0.97La0.02(Hf0.92Ti0.08)O3 antiferroelectric ceramic with triple phase structures
Antiferroelectric–ferroelectric phase transition in antiferroelectric (AFE) materials usually triggers high-performance electrocaloric effect (ECE), as represented by PbZrO3-based AFE. As an isostructure to PbZrO3, EC research in PbHfO3-based AFE ceramics are significantly left out. In this work, temperature dependent electrocaloric performances in Pb0.97La0.02(Hf0.92Ti0.08)O3 with typical AFE features are explored, and rhombohedral ferroelectric (FER), AFE1 (A1, Pbam), and AFE2 (A2, Imma) triple phases are induced as temperature increases. This leads to dual coexisting regions with FER-to-A1 and A1-to-A2 at a temperature of ∼20 °C and ∼100 °C, respectively, where local EC maxima are produced with an ΔT ∼0.06 K and ΔT ∼0.16 K (E = 70 kV/cm). These are certified by comprehensive characterizations of in situ x-ray diffractometer, AFE electrical properties, and Raman spectra analysis. This strongly indicates that AFE (Pbam)-to-AFE (Imma) phase transition could efficiently optimize ECE in PbHfO3-based AFE, in addition to the conventional understandings of FE–paraelectric and AFE–paraelectric modulation strategy. This work not only presents the potential of PbHfO3-based AFE in solid-state cooling applications but also serves as a catalyst for further seeking for high-EC AFE materials.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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