Mössbauer studies of Y3Fe4.75Al0.25O12

Kim, Chul Sung; Min, Byoung Ki; An, Sung Yong; Uhm, Young Rang

doi:10.1016/s0304-8853(01)00625-4

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…The measured hyperfine fields are typical for ferric iron (Fe 3+ ) in a high-spin configuration. The isomer shift δ at room temperature is δ = 0.35(1) mm/s relative to α-Fe metal, which is consistent with the ferric state (Fe 3+ ) in oxide materials [38,39]. This isomer shift differs from that of Fe 4+ (δ = 0.089 mm/s), which suggests that our BBFO compound has no Fe 4+ ions.…”

Section: Discussionsupporting

confidence: 68%

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

et al. 2023

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Emission 57Fe Mössbauer spectroscopy (eMS), following the implantation of radioactive 57Mn+ ions, has been used to study the temperature dependence of the hyperfine magnetic field at Fe sites in Ba-doped BiFeO3 (BFO) thin films. 57Mn β decays (t1/2 = 90 s) to the 14.4 keV Mössbauer state of 57Fe, thus allowing online eMS measurements at a selection of sample temperatures during Mn implantation. The eMS measurements were performed on two thin film BFO samples, 88 nm and 300 nm thick, and doped to 15% with Ba ions. The samples were prepared by pulsed laser deposition on SrTiO3 substrates. X-ray diffraction analyses of the samples showed that the films grew in a tetragonal distorted structure. The Mössbauer spectra of the two films, measured at absorber temperatures in the range 301 K–700 K, comprised a central pair of paramagnetic doublets and a magnetic sextet feature in the wings. The magnetic component was resolved into (i) a component attributed to hyperfine interactions at Fe3+ ions located in octahedral sites (Bhf); and (ii) to Fe3+ ions in implantation induced lattice defects, which were characterized by a distribution of the magnetic field BDistr. The hyperfine magnetic field at the Fe probes in the octahedral site has a room temperature value of Bhf = 44.5(9) T. At higher sample temperatures, the Bhf becomes much weaker, with the Fe3+ hyperfine magnetic contribution disappearing above 700 K. Simultaneous analysis of the Ba–BFO eMS spectra shows that the variation of the hyperfine field with temperature follows the Brillouin curve for S = 5/2.

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Section: Discussionsupporting

confidence: 68%

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

et al. 2023

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“…Based on the previous studies, aluminum-substituted iron in YIG were synthesized by different methods such as sol-gel method 14,17,18 , co-precipitation method 19 , and ball milling 16 . Mössbauer spectra for synthesized garnets were fitted with different numbers of components corresponding to Fe 3+ in octahedral and tetrahedral sites.…”

Section: The Magnetic Properties Of Yig With Chemical Compositionmentioning

confidence: 99%

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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“…Different synthesis routes and heat treatments were adopted for the preparation of iron garnets, including sol-gel method [12,16,17], co-precipitation method [18], and ball milling [13,14,[19][20][21]. Even though YIG garnets with different scenarios of substitution for Fe 3+ , and/ or Y 3+ ions by other rare earth ions were synthesized and carefully characterized, to our best knowledge, no reports were provided on the synthesis and characterization of erbium iron garnet with partial substitution of Fe 3+ ions by Al 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al-substitution on Structural and Magnetic Properties of Er3Fe5-xAlxO12 Garnets

Mahmood

2020

Magnetic Oxides and Composites II

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Er 3 Fe 5-x Al x O 12 (0.0 ≤ x ≤ 0.8) garnets were prepared at 1300 ºC by ball milling method. Rietveld refinement of the samples revealed a garnet structure with Ia3d symmetry. The lattice parameter, cell volume, X-ray density and magnetization of the prepared garnets decreased with the increase of Al content (x). The coercivity of the garnets increased with x, but remained generally low, being below 20 Oe. Low temperature magnetic measurements versus temperature indicated that the magnetization of x = 0.0 exhibited a compensation temperature at ˗186º C, however, x = 0.8 exhibited a minimum at a higher temperature of ˗134º C.

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Mössbauer studies of Y3Fe4.75Al0.25O12

Cited by 6 publications

References 8 publications

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO3 Thin Films Studied by Emission Mössbauer Spectroscopy

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

Effect of Al-substitution on Structural and Magnetic Properties of Er3Fe5-xAlxO12 Garnets

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