journal article·2023-01-13

Enhanced Optical Response in Au Nanopillar/La0.67Sr0.33MnO3 Film Composites: Implications for Magnetooptical Devices

Yaohua Jiang, Jia Guo, Yang Mi, Weizheng Liang, Sheng-Nian Luo, Yanda Ji, Jijie Huang

ACS Applied Nano Materials· Volume 6· Issue 1
Publisher page

Abstract

Metal oxide vertically aligned nanocomposite thin films have been of considerable interest for hot-carrier-based light harvesting and active plasmonic applications. Herein, we present femtosecond pump–probe spectroscopy studies on a nanocomposite thin film with plasmonic Au nanopillars vertically aligned in a ferromagnetic La0.67Sr0.33MnO3 (LSMO) matrix. Our measurements reveal that the carrier decay of Au/LSMO films qualitatively follows that of pure LSMO with a two-component relaxation. In the presence of Au nanopillars, the charge generation within the LSMO film is enhanced by a factor of ∼40, and the spin–lattice relaxation time associated with demagnetization is substantially decreased from 259.6 to 7.7 ps. The enhanced nonequilibrium dynamics and energy transfer between the lattice and spin system in the Au/LSMO films can be well modeled using an extended three-temperature model. These Au/LSMO thin films can be potentially useful in ultrafast photoelectric and magnetooptical applications.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Magnetic properties of thin films · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

The Peac Institute of Multiscale Sciences, Chengdu 610031, People’s Republic of China

School of Resources, Environment and Materials, Guangxi University, Nanning 530004, People’s Republic of China

Department of Applied Physics, College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, People’s Republic of China

MIIT Key Laboratory of Aerospace Information Materials and Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, People’s Republic of China

School of Materials, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China

Funding

National Natural Science Foundation of China

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