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The measurement of anisotropic thermal transport using time-resolved magneto-optical Kerr effect

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Title
The measurement of anisotropic thermal transport using time-resolved magneto-optical Kerr effect
Author(s)
Luu Ly Pham Ngoc; Kyuhwe Kang; Gyung-Min Choi
Publication Date
2021-02-01
Journal
AIP ADVANCES, v.11, no.2, pp.025024-1 - 025024-6
Publisher
AMER INST PHYSICS
Abstract
Owing to the increasing demand for the improved management of thermal transport in devices, it is necessary to develop an optimal method for the measurement of anisotropic heat conduction. Although several techniques have been used to measure the heat transport in anisotropic materials, the accurate determination of anisotropic thermal conductivity remains a major challenge. In this study, we present time-resolved magneto-optical Kerr effect measurement using a pump-probe technique to investigate the thermal characterization of various materials. A substrate/ferromagnetic metal (FM) structure is prepared, where FM acts as a transducer to detect the thermal transport in substrates of silicon, sapphire, and highly ordered pyrolytic graphite. By performing experiments under various modulation frequencies and laser spot sizes, we determine both in-plane and through-plane thermal conductivities. We also discuss the limitations of measurement and provide useful guidelines to determine the thermal properties of different materials with high accuracy.
URI
https://pr.ibs.re.kr/handle/8788114/9515
DOI
10.1063/5.0038149
ISSN
2158-3226
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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