| 0.56GeV C6+离子在YIG上的辐照效应 |
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| 引用本文： | 夏元复,熊宏齐,候明东.0.56GeV C6+离子在YIG上的辐照效应[J].原子核物理评论,1993,10(3):53-55. |
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| 作者姓名： | 夏元复 熊宏齐 候明东 |
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| 作者单位： | 南京大学物理系; 中国科学院近代物理研究所 |
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| 摘 要： | 用穆斯堡尔谱学、正电子湮没技术和高分辨电子显微镜等方法研究了高能碳离子在石榴石铁氧体材料上的辐照效应,辐照效应引起材料微结构变化源于缺陷和缺陷团,导致缺陷周围磁结构变化,内场趋向各向同性,辐照并且使得晶胞参数变大;引起材料磁性能变化源于由于O~2—空位形成而使超交换场降低,从而减小超精细场。 The vacancies and vacancy clusters induced by the irradiation lead to the change of themagnetic structure around the defects. The reduction of the hyperfine magnetic field is caused by thelower superexchange field due to the formation of the O~(2-) vacancies. The change of direction of thehyperfine field has been also observed in Mossbauer spectra. On the other hand, the X-raydiffraction showed that the defects give rise to an increase of the lattice constant of the samples.
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| 关 键 词： | 辐照效应 重离子物理 |
| 收稿时间： | 1900-01-01 |
Irradiation Effects of Y1.6Ca1.4V0.45Sn0.5Fe4.05O12 Induced by Energetic Carbon Ions Bombardment |
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| Xia Yuan-fu,Xiong Hong-qi,Hou Ming-dong.Irradiation Effects of Y1.6Ca1.4V0.45Sn0.5Fe4.05O12 Induced by Energetic Carbon Ions Bombardment[J].Nuclear Physics Review,1993,10(3):53-55. |
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| Authors: | Xia Yuan-fu Xiong Hong-qi Hou Ming-dong |
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| Affiliation: | Department of Physics; Nanjing University; Nanjing 210008 Institute of Modern Physics; Academia Sinica; Lanzhou 730000 |
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| Abstract: | The vacancies and vacancy clusters induced by the irradiation lead to the change of themagnetic structure around the defects. The reduction of the hyperfine magnetic field is caused by thelower superexchange field due to the formation of the O~(2-) vacancies. The change of direction of thehyperfine field has been also observed in Mossbauer spectra. On the other hand, the X-raydiffraction showed that the defects give rise to an increase of the lattice constant of the samples. |
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