Effects of mn substitution on magnetic properties of zno nanoparticles

Retno Asih, Rosana Martina Dhari, Malik Anjelh Baqiya, Fahmi Astuti, Heru Harsono, Chatree Saiyasombat, Takayuki Kawamata, Takashi Noji, Hidetaka Sato, Masatsune Kato, Isao Watanabe, Darminto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Effects of Mn-substitution on magnetic properties of Zn1-xMnxO (MZO) nanoparticles with x= 0.00, 0.03, 0.05 and 0.07 have been investigated along with their local structure. The study on Mn K-edge XANES spectra of MZO reveals that the oxidation state increases by the Mn-substitution, which further implies that MZO exhibits a mixed valence state of Mn3+/Mn4+. The local structure analysis on Mn K-edge EXAFS spectra shows that the coordination number (CN) of Mn reduces by increasing Mn concentration, thus the amount of oxygen vacancy (VO) increases by the Mn-substitution. Interestingly, the magnetization of MZO also tend to increase as the Mn concentration increases. The M(H) curves exhibit linear (paramagnetic) behavior, showing no evidence of room-temperature ferromagnetism. Our results show that the magnetism of MZO is related to the correlation between the Mn magnetic moment and VO.

Original languageEnglish
Title of host publicationMagnetism and its Application
EditorsBudi Purnama, Darminto, Risdiana
PublisherTrans Tech Publications Ltd
Pages166-171
Number of pages6
ISBN (Print)9783035717044
DOIs
Publication statusPublished - 2020
EventInternational Conference on Magnetism and Its Application, ICMIA 2019 - Surakarta, Indonesia
Duration: 2019 Nov 202019 Nov 21

Publication series

NameKey Engineering Materials
Volume855 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

ConferenceInternational Conference on Magnetism and Its Application, ICMIA 2019
CountryIndonesia
CitySurakarta
Period19/11/2019/11/21

Keywords

  • Defect
  • Magnetization
  • Oxygen vacancy
  • XAS
  • ZnO

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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