Mossbauer spectroscopy study of substituted yttrium iron garnets

Lataifeh, Mahdi S.; Lehlooh, Abed-Fatah D.

doi:10.1016/0038-1098(95)00645-1

Cited by 25 publications

(9 citation statements)

References 5 publications

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“…The spectrum of pure YIG (x = 0) was fitted with three magnetic sextets corresponding to iron ions (Fe 3+ ) in three different environments, two octahedral sites with B hf = 497 kOe and 487 kOe and one tetrahedral site with B hf = 401 kOe 23 . The intensity ratio of %37: % 63 for the two sublattices is close to 2:3, which is consistent with previously reported results [23][24][25][26] .…”

Section: Mössbauer Spectroscopysupporting

confidence: 93%

The Structural and the Magnetic Properties of Aluminum Substituted Yttrium Iron Garnet

et al. 2018

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In this paper, Y 3 Al x Fe 5-x O 12 powders with x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 were prepared via solid state reaction method. X-ray diffraction, Vibrating Sample Magnetometry, and Mössbauer Spectroscopy were used to study their structural and magnetic properties. The XRD patterns of the samples show single phase structure with decreasing lattice constant when increasing Al concentration. The saturation magnetization decreases from 28.0 to 10.1 emu/g with increasing Al 3+ from 0.0 to 1.0 due to the reduction of the superexchange interactions between iron ions in the a and d sublattices. Room temperature Mössbauer spectra for the samples were collected and analyzed. The hyperfine field values for octahedral and tetrahedral sites of the samples decreased with increasing Al concentration. Moreover, Mössbauer results have shown that Al 3+ ions prefer to replace Fe +3 at the octahedral sites.

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Section: Mössbauer Spectroscopysupporting

confidence: 93%

The Structural and the Magnetic Properties of Aluminum Substituted Yttrium Iron Garnet

et al. 2018

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“…3 shows the temperature dependent 57 F e Mössbauer spectra of YGdIG measured across T Comp . One can clearly see two components corresponding to Fe 3+ sublattices located at d-and a-sites and the obtained hyperfine parameters match with literature values of garnet [36][37][38]. Values of H int , area fraction and A 23 are shown in Table-1.…”

Section: Figuresupporting

confidence: 81%

Sublattice spin reversal and field induced $Fe^{3+}$ spin-canting across the magnetic compensation temperature in $Y_{1.5}Gd_{1.5}Fe_{5}O_{12}$ rare-earth iron garnet

Kuila¹,

Mardegan²,

Tayal³

et al. 2021

Preprint

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In the present work Fe 3+ & Gd 3+ sublattice spin reversal and Fe 3+ spin-canting across the magnetic compensation temperature (TComp) are demonstrated in polycrystalline Y1.5Gd1.5Fe5O12 (YGdIG) with in-field 57 F e Mössbauer spectroscopy and hard x-ray magnetic circular dichroism (XMCD) measurements. From in-field 57 F e Mössbauer measurements, estimation and analysis of effective internal hyperfine field (H eff ), relative intensity of absorption lines in a sextet elucidated unambiguously the signatures of Fe 3+ spin reversal, their continuous transition and field induced spin-canting of Fe 3+ sublattices across TComp. Further, Fe K-(Gd L3-) edge XMCD data is observed to consist the spectral features from Gd 3+ (Fe 3+ ) magnetic ordering enabling the extraction of both the sublattice (Fe 3+ & Gd 3+ ) information from a single edge XMCD analysis. The observed magnetic moment variation of both the sublattices extracted from either Fe K-or Gd L3-edge XMCD data is observed to follow the trend of bulk magnetization.

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“…The Mössbauer spectra of some annealed samples are presented in Figure 5 and the respective hyperfine parameters displayed in Table II. It can be verified, either in the gadolinium compound spectrum (Figure 5a) or in the yttrium compound spectrum (Figure 5b), for the 1100-C/3 h annealed samples, the presence of particular pairs of sextets, having magnetic hyperfine fields comparable to those values previously reported in literature for GdIG or YIG [6,7]. The subspectral areas were constrained in the fitting routine according to the respective populations of the two iron sites in garnets (i.e., 2:3) [8].…”

Section: Resultsmentioning

confidence: 98%

Mechanosynthesis of YIG and GdIG: A Structural and Mössbauer Study

et al. 2005

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We have investigated the mechanosynthesis of gadolinium and yttrium iron garnets by high-energy ball-milling of -Fe 2 O 3 and Gd 2 O 3 or -Fe 2 O 3 and Y 2 O 3 , respectively, followed by short thermal annealings conducted at moderate temperatures. The samples were characterized by X-ray diffraction and Mössbauer spectroscopy, in order to determine the influence of the milling time and annealing conditions on the final products. For as-milled samples of each rare-earth system, the results revealed the formation of perovskite phases, in relative amounts that depend on the milling time. The formation of garnet phases was observed in as-annealed samples treated at 1000-C for 2 h or 1100-C for 3 h, i.e., at very modest annealing requirements when compared with ordinary solid-state-reaction processes performed without previous high-energy milling. Also, the occurrence was verified of a milling time for which the relative amount of garnet phases formed by annealing was maximized. This time depends on the rare-earth composing the garnet phase and on the annealing temperature.

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Mossbauer spectroscopy study of substituted yttrium iron garnets

Cited by 25 publications

References 5 publications

The Structural and the Magnetic Properties of Aluminum Substituted Yttrium Iron Garnet

The Structural and the Magnetic Properties of Aluminum Substituted Yttrium Iron Garnet

Sublattice spin reversal and field induced $Fe^{3+}$ spin-canting across the magnetic compensation temperature in $Y_{1.5}Gd_{1.5}Fe_{5}O_{12}$ rare-earth iron garnet

Mechanosynthesis of YIG and GdIG: A Structural and Mössbauer Study

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