Structural and Magnetic Studies of Ga-doped Yttrium Iron Garnet
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2021年第1期
论文作者：Khozima Hamasha Qassem I Mohaidat Mahdi Lataifeh Ibrahim Bsoul Sami H Mahmood
文章页码：13 - 21
摘 要：Ga-doped Yttrium Iron Garnet (Y3GaxFe5-xO12,Ga:YIG) was prepared by solid state reaction method and sintering at 1 300 ℃.Rietveld analysis of X-ray diffraction patterns indicated that all samples crystallized in a single cubic structure （space group Ia-3d） with decreasing lattice constant as Ga concentration increased.SEM surface micrograph images of YIG samples showed highly compacted grains with small reduction in the grain size with increasing Ga concentration.Raman spectroscopy measurements confirmed the replacement of Fe3+ ions by Ga3+ ions in the garnet structure was revealed by the observed blue shifts in Raman spectra.The saturation magnetization decreased from 28.2 to 4.98 emu g-1 with increasing x from 0.0 to 1.0 due to the preferential substitution of Ga3+ ions for Fe3+ ions at tetrahedral sites.Room temperature M?ssbauer spectra for the samples revealed a reduction of the hyperfine field values for octahedral and tetrahedral sites,and the development of additional components with increasing Ga concentration.Analysis of the magnetic data and M?ssbauer spectra confirmed that spin canting in the substituted garnets plays an important role in explaining the observed reduction of the saturation magnetization as x increased.
Khozima Hamasha1，Qassem I Mohaidat2，Mahdi Lataifeh2，Ibrahim Bsoul3，Sami H Mahmood4
1. Department of Basic Sciences, Al-Huson University College, Al-Balqa Applied University2. Physics Department, Yarmouk University3. Physics Department, Al al-Bayt University4. Physics Department, The University of Jordan
摘 要：Ga-doped Yttrium Iron Garnet (Y3GaxFe5-xO12,Ga:YIG) was prepared by solid state reaction method and sintering at 1 300 ℃.Rietveld analysis of X-ray diffraction patterns indicated that all samples crystallized in a single cubic structure （space group Ia-3d） with decreasing lattice constant as Ga concentration increased.SEM surface micrograph images of YIG samples showed highly compacted grains with small reduction in the grain size with increasing Ga concentration.Raman spectroscopy measurements confirmed the replacement of Fe3+ ions by Ga3+ ions in the garnet structure was revealed by the observed blue shifts in Raman spectra.The saturation magnetization decreased from 28.2 to 4.98 emu g-1 with increasing x from 0.0 to 1.0 due to the preferential substitution of Ga3+ ions for Fe3+ ions at tetrahedral sites.Room temperature M?ssbauer spectra for the samples revealed a reduction of the hyperfine field values for octahedral and tetrahedral sites,and the development of additional components with increasing Ga concentration.Analysis of the magnetic data and M?ssbauer spectra confirmed that spin canting in the substituted garnets plays an important role in explaining the observed reduction of the saturation magnetization as x increased.
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