Effect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbons
The Ce17Fe78-xB6Gax (x=0-1.0) ribbons were fabricated by a melt-spinning technique in order to study the mechanism of the valence variation of Ce and their magnetic properties as well as improve the thermal stability of Ce-based rare earth permanent magnets. The systematic investigations of the Ce17...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2017-08-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5000703 |
| _version_ | 1819149155500556288 |
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| author | Qingzheng Jiang Minglong Zhong Weikai Lei Qingwen Zeng Yongfeng Hu Qichen Quan Yaping Xu Xianjun Hu Lili Zhang Renhui Liu Shengcan Ma Zhenchen Zhong |
| author_facet | Qingzheng Jiang Minglong Zhong Weikai Lei Qingwen Zeng Yongfeng Hu Qichen Quan Yaping Xu Xianjun Hu Lili Zhang Renhui Liu Shengcan Ma Zhenchen Zhong |
| author_sort | Qingzheng Jiang |
| collection | DOAJ |
| description | The Ce17Fe78-xB6Gax (x=0-1.0) ribbons were fabricated by a melt-spinning technique in order to study the mechanism of the valence variation of Ce and their magnetic properties as well as improve the thermal stability of Ce-based rare earth permanent magnets. The systematic investigations of the Ce17Fe78-xB6Gax (x=0-1.0) alloys show that the room-temperature coercivity increases significantly from 352 kA/m at x = 0 to 492 kA/m at x = 1.0. The Curie temperature (Tc) increases monotonically from 424.5 K to 433.6 K, and the temperature coefficients of remanence (α) and coercivity (β) of the ribbons are better off from -0.56 %/K, -0.75 %/K for x = 0 to -0.45 %/K, -0.65 %/K for x = 0.75 in the temperature range of 300–400 K, respectively. The Ce L3-edge X-ray absorption near edge structure (XANES) spectrums reveal that there is more Ce4+ in ribbons under total electron yield than fluorescence yield as Ce has a high affinity with oxygen. The weight of Ce3+ increases while the weight of Ce4+ decreases in Ga-added alloys. The refined grain size and a more uniform microstructure are mainly attributed to the improved magnetic properties and thermal stability with Ga doping. This paper may serve as a reference for further developing the so-called gap magnets and the effective utilization of the rare earth resources. |
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| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-22T13:57:07Z |
| publishDate | 2017-08-01 |
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| spelling | doaj.art-c8b6848213a0499e81c9cb2f4cc544dc2022-12-21T18:23:32ZengAIP Publishing LLCAIP Advances2158-32262017-08-0178085013085013-510.1063/1.5000703063708ADVEffect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbonsQingzheng Jiang0Minglong Zhong1Weikai Lei2Qingwen Zeng3Yongfeng Hu4Qichen Quan5Yaping Xu6Xianjun Hu7Lili Zhang8Renhui Liu9Shengcan Ma10Zhenchen Zhong11Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaCanadian Light Source, University of Saskatchewan, Saskatoon, SK S7N2V3, CanadaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaInstitute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaThe Ce17Fe78-xB6Gax (x=0-1.0) ribbons were fabricated by a melt-spinning technique in order to study the mechanism of the valence variation of Ce and their magnetic properties as well as improve the thermal stability of Ce-based rare earth permanent magnets. The systematic investigations of the Ce17Fe78-xB6Gax (x=0-1.0) alloys show that the room-temperature coercivity increases significantly from 352 kA/m at x = 0 to 492 kA/m at x = 1.0. The Curie temperature (Tc) increases monotonically from 424.5 K to 433.6 K, and the temperature coefficients of remanence (α) and coercivity (β) of the ribbons are better off from -0.56 %/K, -0.75 %/K for x = 0 to -0.45 %/K, -0.65 %/K for x = 0.75 in the temperature range of 300–400 K, respectively. The Ce L3-edge X-ray absorption near edge structure (XANES) spectrums reveal that there is more Ce4+ in ribbons under total electron yield than fluorescence yield as Ce has a high affinity with oxygen. The weight of Ce3+ increases while the weight of Ce4+ decreases in Ga-added alloys. The refined grain size and a more uniform microstructure are mainly attributed to the improved magnetic properties and thermal stability with Ga doping. This paper may serve as a reference for further developing the so-called gap magnets and the effective utilization of the rare earth resources.http://dx.doi.org/10.1063/1.5000703 |
| spellingShingle | Qingzheng Jiang Minglong Zhong Weikai Lei Qingwen Zeng Yongfeng Hu Qichen Quan Yaping Xu Xianjun Hu Lili Zhang Renhui Liu Shengcan Ma Zhenchen Zhong Effect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbons AIP Advances |
| title | Effect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbons |
| title_full | Effect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbons |
| title_fullStr | Effect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbons |
| title_full_unstemmed | Effect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbons |
| title_short | Effect of Ga addition on the valence state of Ce and magnetic properties of melt-spun Ce17Fe78-xB6Gax (x = 0-1.0) ribbons |
| title_sort | effect of ga addition on the valence state of ce and magnetic properties of melt spun ce17fe78 xb6gax x 0 1 0 ribbons |
| url | http://dx.doi.org/10.1063/1.5000703 |
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