RE2CoMnO6（RE = Tb、Dy、Ho、Tm 和 Yb）双包晶的极性声子特征和固有介电性能

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2024-10-05 DOI:10.1016/j.physb.2024.416601

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引用次数: 0

摘要

RE₂TMTM'O₆ 家族的 RE 基双包晶 (DP) 氧化物表现出迷人的磁介电 (MD) 特性和磁ocaloric 效应 (MCE)，使它们有望应用于高性能超级电容器、存储器、自旋电子器件和低温磁制冷。本文首次利用红外反射光谱研究了 RE2CoMnO6（RE = Tb、Dy、Ho、Tm 和 Yb）陶瓷的振动特性。研究估算了微波（MW）范围内的介电优点因子，包括品质因数（Qu）和静态介电常数（ɛ0）。结果表明，随着稀土离子半径的减小，固有介电常数从大约 26.2 降至 14.4。这些化合物的平均值表明它们适合应用于微波电路器件。

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Polar phonons features and intrinsic dielectric properties of RE2CoMnO6 (RE = Tb, Dy, Ho, Tm and Yb) double perovskites

RE-based double perovskite (DP) oxides of the RE₂TMTM'O₆ family exhibit intriguing magnetodielectric (MD) properties and magnetocaloric effects (MCEs), making them promising candidates for applications in high-performance supercapacitors, memories, spintronic devices, and cryogenic magnetic refrigeration. This paper addresses the vibrational properties of RE₂CoMnO₆ (RE = Tb, Dy, Ho, Tm, and Yb) ceramics for the first time using infrared reflectance spectroscopy. The dielectric merit factors in the microwave (MW) range, including the quality factor (Q_u) and the static dielectric constant (ɛ₀), were estimated. It was observed that the intrinsic dielectric constants decrease from approximately 26.2 to 14.4 as the rare earth ionic radius decreases. The mean values of these compounds suggest their suitability for applications in MW circuitry devices.

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces