Mössbauer studies of ferromagnetism in Fe-doped ZnO magnetic semiconductor

Ahn, Geun Young; Park, Seung-Iel; Shim, In‐Bo; Kim, Chul Sung

doi:10.1016/j.jmmm.2004.04.039

Cited by 75 publications

(36 citation statements)

References 8 publications

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“…The value of the magnetic moment obtained was 0.1004 emu for 4.2% Tidoped ZnO compared with saturation magnetic moment of about 0.15 /Ti atom at room temperature for 5% Tidoped ZnO [4]. Similar existence of ferromagnetism has been observed earlier in Fe-doped ZnO [29] and Mn-doped ZnO [30].…”

Section: Vibrating Sample Magnetometry (Vsm)supporting

confidence: 82%

Structural Characterization and Magnetic Properties of Undoped and Ti-Doped ZnO Nanoparticles Prepared by Modified Oxalate Route

Etape

Foba-Tendo

Ngolui³

et al. 2018

Journal of Nanomaterials

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Ti-doped zinc oxide and pure zinc oxide nanoparticles were synthesized by a modified oxalate route using Averrhoa carambola fruit juice as a natural source of oxalate. The characteristics of the precursors have been investigated by FTIR, TGA, and XRD. The results from the investigation revealed that the precursors are zinc oxalate and Ti-doped zinc oxalate which readily decompose at 450 ∘ C. The as-prepared precursors were calcined at 450 ∘ C for 4 hours, and the decomposition products have been characterized by XRD, SEM, EDX, and VSM. XRD results revealed crystallinity with hexagonal wurtzite structure, while the average grain size was found to be 26 nm for Ti-doped ZnO and 29 nm for ZnO, using calculations based on Debye-Scherrer equation. Furthermore, the morphological studies by SEM showed particle agglomeration, while the presence of Ti 3+ in the zinc oxide lattice is indicated by EDS analysis. Finally the hysteresis loop from VSM results shows that Ti-doped ZnO exhibits ferromagnetism.

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Section: Vibrating Sample Magnetometry (Vsm)supporting

confidence: 82%

Structural Characterization and Magnetic Properties of Undoped and Ti-Doped ZnO Nanoparticles Prepared by Modified Oxalate Route

Etape

Foba-Tendo

Ngolui³

et al. 2018

Journal of Nanomaterials

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show abstract

“…The discrepancy between the Möss-bauer and magnetization results may be explained by speculating that spin-lattice-relaxation effects lead to a collapse of the Zeeman sextet of the magnetic component, thus resulting in the paramagnetic spectra observed in Fig. 3 [14][15][16][17][18]. Taking into account the sample structure and the ranges of isomer shifts (I.S.)…”

Section: Results and Analysismentioning

confidence: 96%

“…However, it has been demonstrated to be possible. For example, the Mössbauer spectra showed no sextet while the M-H curves contained the magnetic hysteresis loops in ferromagnetic Ba(Ti 1−x Fe x )O 3 [14,15], Zn 1−x Fe x O [16,17] and Ti 1−x Fe x O 2 [18]. The discrepancy between the Möss-bauer and magnetization results may be explained by speculating that spin-lattice-relaxation effects lead to a collapse of the Zeeman sextet of the magnetic component, thus resulting in the paramagnetic spectra observed in Fig.…”

Section: Results and Analysismentioning

confidence: 99%

Magnetic properties of transition-metal-codoped BaTiO3 systems

Lin

Shi

2009

Journal of Alloys and Compounds

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“…In particular, 2+ valency was reported for the iron ions in CdS, ZnS, CdSe, ZnSe, CdTe and ZnTe. [13][14][15][16][17][18][19][20] In the case of ZnO the Fe ions have been, however, observed in parallel in both valence states (2+ and 3+) [21][22][23][24][25] or exclusively in 3+ state.…”

Section: -4mentioning

confidence: 99%