Tunable physical properties in Bi-based layered supercell multiferroics embedded with Au nanoparticles

Authors

Jianan Shen, Purdue University
Zihao He, Purdue University
Di Zhang, Purdue University
Ping Lu, Sandia National Laboratories
Julia Deitz, Sandia National Laboratories
Zhongxia Shang, Purdue University
Matias Kalaswad, Purdue University
Haohan Wang, University of Nebraska-Lincoln
Xiaoshan S. Xu, University of Nebraska-LincolnFollow
Haiyan Wang, Purdue University

Date of this Version

6-6-2022

Citation

Nanoscale Adv., 2022, 4, 3054. DOI: 10.1039/d2na00169a

Comments

Used by permission.

Abstract

Multiferroic materials are an interesting functional material family combining two ferroic orderings, e.g., ferroelectric and ferromagnetic orderings, or ferroelectric and antiferromagnetic orderings, and find various device applications, such as spintronics, multiferroic tunnel junctions, etc. Coupling multiferroic materials with plasmonic nanostructures offers great potential for optical-based switching in these devices. Here, we report a novel nanocomposite system consisting of layered Bi_1.25AlMnO_3.25 (BAMO) as a multiferroic matrix and well dispersed plasmonic Au nanoparticles (NPs) and demonstrate that the Au nanoparticle morphology and the nanocomposite properties can be effectively tuned. Specifically, the Au particle size can be tuned from 6.82 nm to 31.59 nm and the 6.82 nm one presents the optimum ferroelectric and ferromagnetic properties and plasmonic properties. Besides the room temperature multiferroic properties, the BAMO-Au nanocomposite system presents other unique functionalities including localized surface plasmon resonance (LSPR), hyperbolicity in the visible region, and magnetooptical coupling, which can all be effectively tailored through morphology tuning. This study demonstrates the feasibility of coupling single phase multiferroic oxides with plasmonic metals for complex nanocomposite designs towards optically switchable spintronics and other memory devices.