Structural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1)
Abstract In this paper, effect of Gd3+ was investigated on structural, magnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4(x = 0, 0.025, 0.050, 0.075, and 0.1) nanoparticles prepared by facile coprecipitation method. X-ray diffraction (XRD) studies confirmed the single cubic spinel phase...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2020-03-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://doi.org/10.1007/s40145-020-0364-y |
| _version_ | 1797724009240985600 |
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| author | Lakshita Phor Vinod Kumar |
| author_facet | Lakshita Phor Vinod Kumar |
| author_sort | Lakshita Phor |
| collection | DOAJ |
| description | Abstract In this paper, effect of Gd3+ was investigated on structural, magnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4(x = 0, 0.025, 0.050, 0.075, and 0.1) nanoparticles prepared by facile coprecipitation method. X-ray diffraction (XRD) studies confirmed the single cubic spinel phase for all the samples and showed that lattice parameter (a exp) was found to increase from 8.414 to 8.446 Å with the substitution of Gd3+ ions due to their larger ionic radii than the replaced Fe3+ ions. Shape and size of developed nanoparticles were studied using transmission electron microscopy (TEM) and found that particle size decreased from 31.06 to 21.12 nm for x = 0–0.1. Magnetic properties showed that maximum magnetization decreased from 39.21 to 23.59 emu/g, and Curie temperature decreased from 192 to 176 °C with increase in x from 0 to 0.1 due to weakening of superexchange interaction. Dielectric parameters like dielectric constant (ε′ and ε″), dielectric loss (tanδ), AC conductivity (σ ac), and impedance (Z′ and Z″) as a function of frequency and composition were analyzed and discussed. It was found that ε′, ε″, σ ac, and tanδ values decreased with Gd substitution, which has been explained based on Maxwell-Wagner theory and hopping mechanism of electrons between Fe3+ and Fe2+ ions at octahedral sites. Nyquist plots for all the developed compositions showed single semi-circular arc which indicate the dominant effect of grain boundaries. |
| first_indexed | 2024-03-12T10:11:05Z |
| format | Article |
| id | doaj.art-eae48da5aa9a4782a5afb728b5304e91 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T10:11:05Z |
| publishDate | 2020-03-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-eae48da5aa9a4782a5afb728b5304e912023-09-02T10:54:42ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082020-03-019224325410.1007/s40145-020-0364-yStructural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1)Lakshita Phor0Vinod Kumar1Hydrogen Lab, Department of Physics, DCR University of Science and TechnologyHydrogen Lab, Department of Physics, DCR University of Science and TechnologyAbstract In this paper, effect of Gd3+ was investigated on structural, magnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4(x = 0, 0.025, 0.050, 0.075, and 0.1) nanoparticles prepared by facile coprecipitation method. X-ray diffraction (XRD) studies confirmed the single cubic spinel phase for all the samples and showed that lattice parameter (a exp) was found to increase from 8.414 to 8.446 Å with the substitution of Gd3+ ions due to their larger ionic radii than the replaced Fe3+ ions. Shape and size of developed nanoparticles were studied using transmission electron microscopy (TEM) and found that particle size decreased from 31.06 to 21.12 nm for x = 0–0.1. Magnetic properties showed that maximum magnetization decreased from 39.21 to 23.59 emu/g, and Curie temperature decreased from 192 to 176 °C with increase in x from 0 to 0.1 due to weakening of superexchange interaction. Dielectric parameters like dielectric constant (ε′ and ε″), dielectric loss (tanδ), AC conductivity (σ ac), and impedance (Z′ and Z″) as a function of frequency and composition were analyzed and discussed. It was found that ε′, ε″, σ ac, and tanδ values decreased with Gd substitution, which has been explained based on Maxwell-Wagner theory and hopping mechanism of electrons between Fe3+ and Fe2+ ions at octahedral sites. Nyquist plots for all the developed compositions showed single semi-circular arc which indicate the dominant effect of grain boundaries.https://doi.org/10.1007/s40145-020-0364-yspinel ferritecoprecipitation methodstructural propertymagnetismdielectric property |
| spellingShingle | Lakshita Phor Vinod Kumar Structural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1) Journal of Advanced Ceramics spinel ferrite coprecipitation method structural property magnetism dielectric property |
| title | Structural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1) |
| title_full | Structural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1) |
| title_fullStr | Structural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1) |
| title_full_unstemmed | Structural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1) |
| title_short | Structural, thermomagnetic, and dielectric properties of Mn0.5Zn0.5Gd x Fe2−x O4 (x = 0, 0.025, 0.050, 0.075, and 0.1) |
| title_sort | structural thermomagnetic and dielectric properties of mn0 5zn0 5gd x fe2 x o4 x 0 0 025 0 050 0 075 and 0 1 |
| topic | spinel ferrite coprecipitation method structural property magnetism dielectric property |
| url | https://doi.org/10.1007/s40145-020-0364-y |
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