October 14, 2025 Thesis Open Access

GIZACHEW DIGA

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  <identifier identifierType="DOI">10.20372/nadre:19874</identifier>
  <creators>
    <creator>
      <creatorName>GIZACHEW DIGA</creatorName>
    </creator>
  </creators>
  <titles>
    <title>THE STUDY OF FERROMAGNETISM IN II-VI DILUTED MAGNETIC SEMICONDUCTORS, Zn1-xMnxO</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2025</publicationYear>
  <subjects>
    <subject>Diluted magnetic semiconductors, ferromagnetism, Curie temperature, wurtzite structure, ferromagnetic resonance, nanoparticles, magneto transport, giant magneto-resistance, Hall coefficient.</subject>
  </subjects>
  <contributors>
    <contributor contributorType="Supervisor">
      <contributorName>HABTE DULLA (PhD)</contributorName>
    </contributor>
  </contributors>
  <dates>
    <date dateType="Issued">2025-10-14</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="Text">Thesis</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://nadre.ethernet.edu.et/record/19874</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.20372/nadre:19873</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://nadre.ethernet.edu.et/communities/005</relatedIdentifier>
  </relatedIdentifiers>
  <version>Version 1</version>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
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  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Abstract Ferromagnetism in II-VI diluted magnetic semiconductor, Zn1&amp;minus;xMnxO is studied. The magnetic behavior of this DMS is studied by using the Heisenberg and the Green&amp;rsquo;s formalism. The observed ferromagnetism is due to sp - d exchange interactions (RKKY), point defects such as oxygen vacancies, and Zn interstitial. It was also observed that with increasing Mn concentrations up to 4%, the Curie temperature increases and stable ferromagnetic ordering is observed. However, experimenters had found that for Mn concentrations higher than 4% a shift from ferromagnetic to paramagnetic behavior is noticed. This shift is due to the formation of secondary phases in excess of Mn concentrations. The Ferromagnetic behavior of Zn1&amp;minus;xMnxO is detected by theoretical calculation of magnetic quantities by using the Green&amp;rsquo;s theorem. Ferromagnetic resonance studies also reveal that Zn1&amp;minus;xMnxO nanoparticles exhibit ferromagnetic behavior. The difference in the ferromagnetic properties of the Mn-doped ZnO nanoparticles is primarily attributed to the Mn2+ content. Moreover, magneto-transport properties such as giant magneto resistance and Hall Effect coefficient measurement are found as an additional evidence for the ferromagnetic behaviors of Zn1-xMnxO.&lt;/p&gt;</description>
  </descriptions>
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