磷酸键合CoFe2O4–BaTiO3层状结构：介电弛豫和磁电耦合

IF 0.3 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY Lithuanian Journal of Physics Pub Date : 2022-12-10 DOI:10.3952/physics.v62i4.4817

A. Plyushch, D. Lewin, P. Ažubalis, V. Kalendra, A. Sokal, R. Grigalaitis, V. Shvartsman, S. Salamon, H. Wende, A. Selskis, K. Lapko, D. Lupascu, J. Banys

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引用次数: 0

摘要

通过单轴挤压形成了多层磷酸盐键合的CoFe2O4–BaTiO3–CoFe2O3（CBC）和BaTiO3-CoFe2O4-BaTiO3（BCB）多铁性结构。在20 Hz–1 GHz频率和120–500 K温度范围内研究了介电性能。CBC的复介电常数为15–0.17i，BCB为22–0.04i，在250 K以下与温度和频率无关。在更高的温度下，出现了由Maxwell–Wagner弛豫控制的强色散。这种行为是由样本的2–2连接性决定的。发现0.2 mVOe–1cm–1的BaTiO3–CoFe2O4–BaTiO3结构的直接磁电耦合系数最高。

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Phosphate bonded CoFe2O4–BaTiO3 layered structures: Dielectric relaxations and magnetoelectric coupling

Multilayered phosphate bonded CoFe2O4–BaTiO3–CoFe2O4 (CBC) and BaTiO3–CoFe2O4 – BaTiO3 (BCB) multiferroic structures were formed by means of uniaxial pressing. The dielectric properties were studied in 20 Hz – 1 GHz frequency and 120–500 K temperature ranges. The complex dielectric permittivity is 15–0.17i for CBC and 22–0.04i for BCB, it is temperature- and frequency-independent below 250 K. At higher temperatures, strong dispersion appeared governed by the Maxwell–Wagner relaxation. Such behaviour is determined by the 2–2 connectivity of the sample. The highest direct magnetoelectric coupling coefficient was found for the BaTiO3–CoFe2O4–BaTiO3 structure of 0.2 mVOe–1cm–1.

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来源期刊

Lithuanian Journal of Physics 物理-物理：综合

CiteScore

0.90

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： The main aim of the Lithuanian Journal of Physics is to reflect the most recent advances in various fields of theoretical, experimental, and applied physics, including: mathematical and computational physics; subatomic physics; atoms and molecules; chemical physics; electrodynamics and wave processes; nonlinear and coherent optics; spectroscopy.