Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Weak Magnetism of Aurivillius-Type Multiferroic Thin Films Probed by Polarized Neutron Reflectivity

Published

Author(s)

Xioafang Zhai, Alexander Grutter, Yu Yun, Zhangzhang Cui, Yalin Lu

Abstract

Unambiguous magnetic characterization of room-temperature multiferroic materials remains challenging due in part to difficulty of distinguishing their very weak ferromagnetism from magnetic impurity phases and other containments. In this study, we used polarized neutron reflectivity to probe the magnetization of the Bi6FeCoTi3O18 and LaBi5FeCoTi3O18 in their epitaxial thin films while eliminating a variety of impurity contributions. Our results show that LaBi5FeCoTi3O18 exhibits a magnetization of about 0.016 ±0.027 υΒ per Fe-Co pair at room temperature. While the Bi6FeCoTi3O18 thin film only exhibits weak magnetic moment below room temperature, with a saturation magnetization of 0.049 ± 0.015 υΒ per Fe-Co pair at 50 K. This polarized-neutron-reflectivity study places an upper magnetization limit on the matrix material of the Aurivillius oxides and helps to clarify the true mechanism behind the room temperature multiferroic performance.
Citation
Physical Review Materials
Volume
2
Issue
4

Keywords

Magnetism, Thin Film, Oxide, Aurivilius, Neutron Reflectometry, Multiferroic

Citation

Zhai, X. , Grutter, A. , Yun, Y. , Cui, Z. and Lu, Y. (2018), Weak Magnetism of Aurivillius-Type Multiferroic Thin Films Probed by Polarized Neutron Reflectivity, Physical Review Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925153 (Accessed April 19, 2024)
Created April 26, 2018, Updated October 12, 2021