Unconventional Magnetization Generated from Electron Beam and Femtosecond Irradiation on α-Ag2WO4: A Quantum Chemical Investigation
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Title
Unconventional Magnetization Generated from Electron Beam and Femtosecond Irradiation on α-Ag2WO4: A Quantum Chemical InvestigationAuthor (s)
Date
2020-04-21Publisher
American Chemical SocietyISSN
2470-1343Bibliographic citation
Marcelo Assis, Renan Augusto Pontes Ribeiro, Maria Helena Carvalho, Mayara Mondego Teixeira, Yara Galvão Gobato, Gabriela Augusta Prando, Cleber Renato Mendonça, Leonardo de Boni, Adilson Jesus Aparecido de Oliveira, Jefferson Bettini, Juan Andrés, and Elson Longo. Unconventional Magnetization Generated from Electron Beam and Femtosecond Irradiation on α-Ag2WO4: A Quantum Chemical Investigation. ACS Omega 2020 5 (17), 10052-10067 DOI: 10.1021/acsomega.0c00542Type
info:eu-repo/semantics/articlePublisher version
https://pubs.acs.org/doi/10.1021/acsomega.0c00542Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Novel magnetic metals and metal oxides that use both the spin and charge of an electron offer exciting technological applications. Their discovery could boost research on functional nanoscale materials. Here, for the ... [+]
Novel magnetic metals and metal oxides that use both the spin and charge of an electron offer exciting technological applications. Their discovery could boost research on functional nanoscale materials. Here, for the first time, we report the magnetization of α-Ag2WO4 under electron beam and femtosecond laser irradiation. The formation and growth of silver oxides (AgO, Ag2O, and Ag3O4) and Ag nanofilaments can be observed on the surface of α-Ag2WO4 crystals. These features were also present in the composition of an extruded material and could open new avenues for surface magnetism studies. In order to understand these results, we used first-principles density functional theory calculations. This allowed us to investigate several potential scenarios for controlling magnetic properties. The effect of electron addition on the crystalline structures of α-Ag2WO4, Ag3O4, Ag2O, and AgO has been analyzed in detail. The creation of Ag and O vacancies on these compounds was also analyzed. Based on structural and electronic changes at the local coordination site of Ag, a mechanism was proposed. The mechanism illustrates the processes responsible for the formation and growth of metallic Ag and the magnetic response to electron beam irradiation. [-]
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ACS omega, 2020, vol. 5, no 17Investigation project
Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP): 2013/07296-2, 2016/10668-7, 2018/01808-5, 2018/11283-7, 2016/20886-1, 2017/24995-2, Ciencia Tecnologia e Inovacao (FINEP); National Council for Scientific and Technological Development (CNPq): 166281/2017-4; CAPES: 001; Universitat Jaume I: UJI-B2019-30 Ministerio de Ciencia, Innovacion y Universidades (Spain): PGC2018-094417-B-I00Rights
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