Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramics
The YCr0.5Fe0.5O3 ceramics with different sintering temperatures (TS) have been synthesized by a sol-gel method, and the structural, magnetic and dielectric properties are studied. With the decrease of TS, continuous decrease of grain size is evidenced via the micromorphology analysis. Due to the co...
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| Format: | Article |
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Elsevier
2021-04-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379721001820 |
| _version_ | 1818846680282300416 |
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| author | Jin Yang Rui Jiang Shuai Huang Dexuan Huo |
| author_facet | Jin Yang Rui Jiang Shuai Huang Dexuan Huo |
| author_sort | Jin Yang |
| collection | DOAJ |
| description | The YCr0.5Fe0.5O3 ceramics with different sintering temperatures (TS) have been synthesized by a sol-gel method, and the structural, magnetic and dielectric properties are studied. With the decrease of TS, continuous decrease of grain size is evidenced via the micromorphology analysis. Due to the competition between the single ion magnetic anisotropy and the antisymmetric Dzyaloshinsky-Moriya interaction, the total magnetization becomes zero at the compensation temperature (TComp) in the presence of a lower magnetic field, and the TComp exhibits size dependent behavior. With the decrease of grain size, the TComp becomes lower due to the increase of uncompensated spins. Meanwhile, the TComp is adjustable by the magnetic field, and a larger external field drives the TComp to lower temperature. After cooling the samples in magnetic field, the magnetic anisotropy is established, which results in a positive exchange bias (EB) effect below the TComp. The decrease of TS would increase the ferromagnetic component, which leads to the decrease of EB field (HEB). The dielectric measurements suggest that the samples of TS = 900 and 800 °C possess large permittivity accompanied with dielectric relaxation near room temperature, and the dielectric relaxation which arises from the single-ionized oxygen vacancies moves to higher temperature with the decrease of TS. |
| first_indexed | 2024-12-19T05:49:24Z |
| format | Article |
| id | doaj.art-edbd4f7d85154c79831dc56696d4e807 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-19T05:49:24Z |
| publishDate | 2021-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-edbd4f7d85154c79831dc56696d4e8072022-12-21T20:33:40ZengElsevierResults in Physics2211-37972021-04-0123104015Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramicsJin Yang0Rui Jiang1Shuai Huang2Dexuan Huo3Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, PR ChinaInstitute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, PR ChinaCorresponding author.; Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, PR ChinaInstitute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, PR ChinaThe YCr0.5Fe0.5O3 ceramics with different sintering temperatures (TS) have been synthesized by a sol-gel method, and the structural, magnetic and dielectric properties are studied. With the decrease of TS, continuous decrease of grain size is evidenced via the micromorphology analysis. Due to the competition between the single ion magnetic anisotropy and the antisymmetric Dzyaloshinsky-Moriya interaction, the total magnetization becomes zero at the compensation temperature (TComp) in the presence of a lower magnetic field, and the TComp exhibits size dependent behavior. With the decrease of grain size, the TComp becomes lower due to the increase of uncompensated spins. Meanwhile, the TComp is adjustable by the magnetic field, and a larger external field drives the TComp to lower temperature. After cooling the samples in magnetic field, the magnetic anisotropy is established, which results in a positive exchange bias (EB) effect below the TComp. The decrease of TS would increase the ferromagnetic component, which leads to the decrease of EB field (HEB). The dielectric measurements suggest that the samples of TS = 900 and 800 °C possess large permittivity accompanied with dielectric relaxation near room temperature, and the dielectric relaxation which arises from the single-ionized oxygen vacancies moves to higher temperature with the decrease of TS.http://www.sciencedirect.com/science/article/pii/S2211379721001820CeramicMagneticExchange biasDielectric |
| spellingShingle | Jin Yang Rui Jiang Shuai Huang Dexuan Huo Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramics Results in Physics Ceramic Magnetic Exchange bias Dielectric |
| title | Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramics |
| title_full | Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramics |
| title_fullStr | Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramics |
| title_full_unstemmed | Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramics |
| title_short | Size dependence of magnetic and dielectric properties in YCr0.5Fe0.5O3 ceramics |
| title_sort | size dependence of magnetic and dielectric properties in ycr0 5fe0 5o3 ceramics |
| topic | Ceramic Magnetic Exchange bias Dielectric |
| url | http://www.sciencedirect.com/science/article/pii/S2211379721001820 |
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