Origin of magnetism probed through electron spin resonance studies in Zn^sub 1-x^Mn^sub x^O synthesized by chemical route

Nanocrystalline Zn1-xMnxO (0.005 ≤ x ≤ 0.02) shows room temperature ferromagnetic behaviour. The electron spin resonance spectra of Zn1-xMnxO (0.005≤ x ≤ 0.02) consist of a broad resonance line stemming from interacting spins and a set of hyperfine structure lines originating in the presence of the...

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Bibliographic Details
Published in:Materials chemistry and physics 2018-07, Vol.213, p.52
Main Authors: Routray, Urmishree, Mohapatra, Jyoshnarani, Srinivasu, VV, Mishra, DK
Format: Article
Language:English
Subjects:
Chemical synthesis
Electron paramagnetic resonance
Electron spin
Ferromagnetic resonance
Ferromagnetism
Hyperfine structure
Inhomogeneity
Ions
Magnetism
Manganese ions
Nanocrystals
Organic chemistry
Oxygen
Resonance lines
Spin resonance
Zinc oxide
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Summary:Nanocrystalline Zn1-xMnxO (0.005 ≤ x ≤ 0.02) shows room temperature ferromagnetic behaviour. The electron spin resonance spectra of Zn1-xMnxO (0.005≤ x ≤ 0.02) consist of a broad resonance line stemming from interacting spins and a set of hyperfine structure lines originating in the presence of the paramagnetic Mn2+ ions. The broad resonance lines and the observation of resonance at low field indicate the magnetic inhomogeneity of the sample. The ferromagnetic contribution coming from the cationic interaction like Zn2+-Zn2+, Zn2+-Mn2+ independently or through oxygen vacancies dominate over the paramagnetic behaviour of Mn2+-Mn2+ interaction and gives rise to ferromagnetic behaviour in Mn doped ZnO system.
ISSN:0254-0584
1879-3312