Journal Published Online: 09 December 2021
Volume 10, Issue 1

Raman Spectroscopy Investigation of a Manganese Oxide Layer Caused by Water Corrosion on an IrMn Thin Film

CODEN: MPCACD

Abstract

Raman spectroscopy was used to identify a manganese oxide layer established on iridium manganese (IrMn) thin films. A thin manganese oxide layer on the IrMn surface was created by dropping deionized (DI) water for 30 min. Field emission scanning electron microscope and Raman spectroscopy with a 532-nm laser wavelength were used to investigate the DI-water–exposed IrMn surface. The intensity of the Raman laser beam, varied from 0.05 to 50 mW, was carefully optimized to avoid laser-induced heat effects on the manganese oxide layer and IrMn thin film. The results showed that the laser-induced heat produced an α-Mn3O4 phase on the IrMn surface and a manganese oxide layer at 25 mW. Raman optimization was used to investigate the DI-water corrosion and manganese oxide structures on different areas of the IrMn surface.

Author Information

Mopoung, Kunpot
Nanoscience and Technology Interdisciplinary Program, Graduate School, Chulalongkorn University, Bangkok, Thailand Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
Suwanyangyaun, Pattana
Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
Sawaengsai, Kanogkwan
Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
Supadee, Laddawan
Western Digital Corporation Thailand, Phra Nakhon Si Ayutthaya, Thailand
Nuntawong, Noppadon
Opto-Electrochemical Sensing, National Electronics and Computer Technology Center, National Science and Technology Development Agency, Pathumthani, Thailand
Tungasmita, Sukkaneste
Nanoscience and Technology Interdisciplinary Program, Graduate School, Chulalongkorn University, Bangkok, Thailand Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
Sanorpim, Sakuntam
Nanoscience and Technology Interdisciplinary Program, Graduate School, Chulalongkorn University, Bangkok, Thailand Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
Pages: 8
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Stock #: MPC20210060
ISSN: 2379-1365
DOI: 10.1520/MPC20210060