| Paramagnetic Anisotropy of CdGd2（WO4） 4-δ Single Crystal |
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| 引用本文： | 侯碧辉,王雅丽,孙桂芳,刘国庆,王吉有.Paramagnetic Anisotropy of CdGd2（WO4） 4-δ Single Crystal[J].中国稀土学报(英文版),2007,25(1):27-30. |
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| 作者姓名： | 侯碧辉 王雅丽 孙桂芳 刘国庆 王吉有 |
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| 作者单位： | [1]College of Applied Science, Beijing University of Technology, Beijing 100022, China [2]School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （69977005） |
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| 摘 要： | CdGd2 （WO4）4 -δ single crystal was grown using the Czochralski＇s method. The crystal structure was tetragonal seheelite with lattice parameters a = b = 0.5203 nm and c = 1. 1359 nm. There were vacancies of （WO4）^2- , therefore, there were some Gd^2＋ ions. Langevin paramagnetism and anisotropy were observed from the δ-T curves at room temperature. The susceptibility X//was 3.5018×10^-3, and X⊥ was 3.4403× 10^-2. The anisotropy was also observed in the electron spin resonance （ESR） experiments. The anisotropic Land6 factors were g//= 2. 1333 and g~ = 2. 8411. The direction of easy magnetization was in the α-b plane. Anisotropic paramagnetic Curie constants C//and C⊥ were not only related to macroscopic a that was observed through the experiment, but were also related to J⊥ and J//, which were the microscopic quantum numbers of the Gd^2＋ and Gd^3｜ ions. Based on the detailed analyses, the proportion of 36.8% of Gd^3＋ ions to 63.2% of Gd^2＋ ions in the Gd ions of the CdGd2（WO4）4-δ crystal was calculated, and δ was 0.638 in the single crystal.
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| 关 键 词： | 稀土元素 镉 钆 单晶体 顺磁各向异性 |
| 文章编号： | 1002-0721（2007）01-0027-04 |
| 收稿时间： | 20 February 2006 |
| 修稿时间： | 2006-02-202006-07-10 |
Paramagnetic Anisotropy of CdGd2(WO4)4-δ Single Crystal |
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| Hou , Wang Yali, Sun Guifang, Liu Guoqing,Wang Jiyou.Paramagnetic Anisotropy of CdGd2(WO4)4-δ Single Crystal[J].Journal of Rare Earths,2007,25(1):27-30. |
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| Authors: | Hou Wang Yali Sun Guifang Liu Guoqing Wang Jiyou |
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| Affiliation: | 1. College of Applied Science, Beijing University of Technology, Beijing 100022, China ; 2. School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China |
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| Abstract: | CdGd2(WO4)4-† single crystal was grown using the Czochralski's method. The crystal structure was tetragonal scheelite with lattice parameters a = b = 0.5203 nm and c = 1.1359 nm. There were vacancies of (WO4)2-, therefore, there were some Gd2+ ions. Langevin paramagnetism and anisotropy were observed from the σ-T curves at room temperature. The susceptibility χ// was 3.5018 × 10−3, and χ was 3.4403 × 10−2. The anisotropy was also observed in the electron spin resonance (ESR) experiments. The anisotropic Landé factors were g// = 2.1333 and g = 2.8411. The direction of easy magnetization was in the a-b plane. Anisotropic paramagnetic Curie constants C// and C were not only related to macroscopic σ that was observed through the experiment, but were also related to J and J//, which were the microscopic quantum numbers of the Gd2+ and Gd3+ ions. Based on the detailed analyses, the proportion of 36.8% of Gd3+ ions to 63.2% of Gd2+ ions in the Gd ions of the CdGd2(WO4)4-σ crystal was calculated, and δ was 0.638 in the single crystal. |
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| Keywords: | CdGd(WO4)4-δ single crystal anisotropy Langevin paramagnetism rare earths |
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