Magnetic Study of Al-Substituted Holmium Iron Garnet

Lataifeh, Mahdi S.

doi:10.1143/jpsj.69.2280

Cited by 17 publications

(9 citation statements)

References 7 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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“…The data is analyzed with NORMOS software considering the simplest model i.e., two sites of Fe 3+ at d-, a-sites as the main objective of the work is to show the usefulness of H eff estimation in visualizing the sub-lattice spin reversal across magnetic compensation. The observed hyperfine parameters, as mentioned in Table 2 match with literature [21,22]. One can observe the following from the in-field M össbauer data.…”

Section: Resultssupporting

confidence: 86%

In-field 57Fe M$\ddot {o}$ssbauer spectroscopy study of polycrystalline rare-earth iron garnet (R3Fe5O12; R=Y, Gd, Ho, Tm, & Yb) compounds

Kuila

Reddy

2021

Hyperfine Interact

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The present work reports the in-field 57 F e M össbauer spectroscopy measurements on polycrystalline R 3 Fe 5 O 12 (RIG, R=Y, Gd, Ho, Tm, & Yb) rare-earth iron garnets. The contrast between the effective hyperfine field (H eff ) values of two Fe 3+ sites (tetrahedral, d-and octahedral, a-sites) across magnetic compensation (T Comp ) facilitates to probe the Fe 3+ sublattice spin reversal in RIG systems (R=Gd, Ho and Yb) exhibiting magnetic compensation. Further, the analysis of relative intensity of absorption lines in a sextet from the field dependent 57 F e M össbauer spectroscopy measurements carried out in polycrystalline YbIG, below T Comp , show the clear signatures of field induced perpendicular Fe 3+ spin configuration when applied external field is 50 kOe.

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“…Finally, the hyperfine interactions in representative samples were investigated using 57 Fe Mössbauer spectroscopy (MS). This spectroscopy is based on the local Mössbauer effect [107], which was extensively used to investigate the local chemical environment, valence state, and site symmetry of Fe in alloys [108][109][110][111][112], intermetallic compounds [113][114][115], geological samples [116,117], garnets [118][119][120][121], and various types of ferrites [122][123][124][125]. Mössbauer spectra for the samples were collected over 512 channels using a conventional constant acceleration Mössbauer spectrometer operating with 57 Co/Cr source.…”

Section: Sample Characterizationmentioning

confidence: 99%

Modification of the Magnetic Properties of Co<sub>2</sub>Y Hexaferrites by Divalent and Trivalent Metal Substitutions

Mahmood

Zaqsaw

Mohsen

et al. 2015

SSP

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Abstract. The present study is concerned with the fabrication and characterization of Me2Y substituted hexaferrites, Ba2Me2Fe12-xTxO22 (Me = Co 2+ , Mg 2+ , and Cr 2+ , and T = Fe 3+ , and Ga 3+ ). The samples were prepared by the conventional ball milling technique and sintering at 1200° C. The effect of the choices of Me and T ions on the structural and magnetic properties of the hexaferrites were investigated. XRD patterns, magnetic parameters, and Mössbauer spectra of the Co2Y were consistent with a single phase Y-type hexaferrite. However, the CoCr-Y sample was found to be dominated by the Y-type hexaferrite, and M-type and BaCrO4 minority phases were observed in the XRD pattern of the sample. The small increase in saturation magnetization from about 34 emu/g up to 37.5 emu/g was therefore attributed to the development of the M-type phase. On the other hand,

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Magnetic Study of Al-Substituted Holmium Iron Garnet

Cited by 17 publications

References 7 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

In-field 57Fe M$\ddot {o}$ssbauer spectroscopy study of polycrystalline rare-earth iron garnet (R3Fe5O12; R=Y, Gd, Ho, Tm, & Yb) compounds

Modification of the Magnetic Properties of Co<sub>2</sub>Y Hexaferrites by Divalent and Trivalent Metal Substitutions

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