探究通过溶胶-凝胶法和旋涂法制备的CoFeO/BNT-BT复合薄膜的介电、压电和磁性能。

Probing the dielectric, piezoelectric and magnetic behavior of CoFeO/BNT-BT composite thin film fabricated by sol-gel and spin-coating methods.

作者信息

Cernea Marin, Vasile Bogdan Stefan, Surdu Vasile Adrian, Trusca Roxana, Bartha Cristina, Craciun Floriana, Galassi Carmen

机构信息

National Institute of Materials Physics, P.O. Box MG-7, Bucharest-Magurele, 077125, Romania.

University POLITEHNICA of Bucharest, 060042, Bucharest, Romania.

出版信息

Sci Rep. 2018 Dec 14;8(1):17883. doi: 10.1038/s41598-018-36232-3.

DOI:10.1038/s41598-018-36232-3

PMID:30552360

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6294755/

Abstract

We investigated in this paper a novel bilayer composite obtained by sol-gel and spin coating of the ferroelectric 0.92NaBiTiO-0.08BaTiO (abbreviated as BNT-BT) and ferromagnetic CoFeO phases, for miniature low-frequency magnetic sensors and piezoelectric sensors. This heterostructure, deposited on Si-Pt substrate (Si-Pt/CoFeO/BNT-BT), was characterized using selected method such as: X-ray diffraction, dielectric spectroscopy, piezoelectric force microscopy, SQUID magnetometry, atomic force microscopy/magnetic force microscopy, and advanced methods of transmission electron microscopy. CoFeO/BNT-BT ferromagnetic-piezoelectric thin films show good magnetization, dielectric constant and piezoelectric response. The results of analyses and measurements reveal that this heterostructure can have applications in high-performance magnetoelectric devices at room temperature.

摘要

在本文中，我们研究了一种新型双层复合材料，它是通过溶胶-凝胶法和旋涂法将铁电体0.92NaBiTiO-0.08BaTiO（缩写为BNT-BT）和铁磁体CoFeO相制备而成的，用于微型低频磁传感器和压电传感器。这种沉积在Si-Pt衬底上的异质结构（Si-Pt/CoFeO/BNT-BT），使用了诸如X射线衍射、介电谱、压电力显微镜、超导量子干涉仪磁力测量、原子力显微镜/磁力显微镜以及先进的透射电子显微镜方法进行表征。CoFeO/BNT-BT铁磁-压电薄膜表现出良好的磁化强度、介电常数和压电响应。分析和测量结果表明，这种异质结构可应用于室温下的高性能磁电器件。