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| 1 | Exchange-coupling interaction and effective anisotropy in nanocomposite permanent materials显示文摘Taking Nd2Fe14B/α-Fe as example, the exchange-coupling interactions between magnetically soft and hard grains in nanocomposite permanent materials and their effects on the effective anisotropy of materials were investigated. The calculation results expressed that the exchange-coupling interactions are enhanced with the reduction of grain size, and the effective anisotropy of materials decreases with the reduction of gram size and the increase of magnetically soft phase component. The remanence and the effective anisotropy of materials possess the opposite variation trend with the change of grain size and phase ratio. The mean grain size should be in the range of 10-15 nm and the ratio of soft phase should be less than 50% for getting the magnet with high energy product. | Ruwei Gao Weicun Feng Wei Chen Biao Wang Guangbing Han Peng Zhang | 2002 | Chinese Science Bulletin2002，47，14： | 5 |
| 2 | Effect of microstructure on the coercivity of HDDR Nd-Fe-B permanent magnetic alloy显示文摘The effect of the grain boundary microstructure on the anisotropy and coercivity was investigated in an HDDR Nd-Fe-B permanent magnetic alloy. Considering the special microstructure of its magnetic powder grain, an anisotropic theoretical model influenced simultaneously by the structure defect at the grain boundary and the exchange coupling interaction was put forward. The variations of the structure defect factors based on the nucleation and pinning mechanism with 2r0/lex (where r0 and lex are the defect thickness and the length of exchange coupling, respec-tively) were calculated. The results show that the coercivity mechanism of an HDDR Nd-Fe-B permanent magnetic alloy is greatly related to its microstructure defect at the grain boundary. For a fixed lex, when 2r0/lex < 1.67, the coercivity is controlled by the pinning mechanism; when 2r0/lex > 1.67, it is determined by the nucleation mechanism. The coercivity reaches the maximum when 2r0/lex = 1.67. The calcula-tion result is consistent well with the experimental result given by Morimoto et al. | LIU Min SUN Yan HAN GuangBing YANG Wu GAO RuWei | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，10： | 2 |
| 3 | Effective anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent magnetic materials 显示文摘 | Han Guangbing Gao Ruwei Feng Weicun | 2003 | Science in China (G)2003，46，4： | 1 |
| 4 | Effective anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent magnetic material显示文摘 | Guangbing Han Ruwei Gao Weicun Feng Hanqiang Liu Biao Wang Peng Zhang Wei Chen Wei Li Yongquan Guo | 2003 | Science in China Series G: Physics Mechanics and Astronomy2003，，4： | 1 |
| 5 | Effective anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent magnetic material显示文摘 | Guangbing Han Ruwei Gao Weicun Feng Hanqiang Liu Biao Wang Peng Zhang Wei Chen Wei Li Yongquan Guo | 2003 | Science in China Series G: Physics Mechanics and Astronomy2003，，4： | 1 |
| 6 | Dependence of magnetic properties of HDDR Nd-Fe-B bonded magnet on intergranular phase显示文摘用在谷物边界的建议不同 anisotropy 表情 K 1′(r) 和 K 1″(r) ,我们调查效果内部平均 anisotropy 〈K 1〉 上的小粒的阶段(IP )谷物边界和 coercivity H HDDR (加氢, disproportionation,解吸附作用和再结合) 的 c Nd-Fe-B 结合了磁铁。当 IP 的厚度 d 是零时,结果显示那, 〈K 1〉并且 H c 基于 K 1″(r) 基于 K 1′(r) 等于相应的。当 d 拿非零价值时, 〈K 1〉并且 H 分别地, c 与增加 d 更快基于 K 1″(r) 掉落并且升起。当 d 是 1 nm,结构缺点厚度 r 0 接近域墙(∼4 nm ) 的厚度时,计算 coercivity 与 avaiable 一致很好试验性的数据。 | LIU Min GAO RuWei HAN GuangBing YANG Wu | 2009 | Chinese Science Bulletin2009，54，18： | 0 |
| 7 | Magnetic rotation in Rubidium-84显示文摘High-spin states in 84 Rb have been studied by using the 70Zn(18O, p3n)84Rb reaction at beam energy of 75MeV. Three regular magnetic dipole bands including strong M1 and weak E2 transitions have been observed in this nucleus which shows the characteristic feature of magnetic rotation. These bands are interpreted in the projected shell model for the first time on the basis of the four-quasiparticle configuration of the type π(fp)π(g29/2)v(g9/2). It is shown that the calculated sequence lies roughly in the same energy range as the experimental one but the interval between neighboring levels is larger than the corresponding experimental value. We believe that a 4-quasiparticle band crossing with the 2-quasiparticle band will depress the energies of the states. | SHEN Shuifa HAN Guangbing WEN Shuxian YAN Yupeng WU Xiaoguang ZHU Lihua HE Chuangye LI Guangsheng | 2013 | Nuclear Science and Techniques2013，24，3： | 0 |
| 8 | Exchange-coupling interaction, effective anisotropy and magnetic property of nano-magnetic materials显示文摘在在 nanocrystalline 的谷物之间的联合交换的相互作用的理论和模型磁性的材料这里被介绍。他们的不足和区别 frcrn 试验性的结果被削尖 out' 和一些修订被做。阶段部件 ratio' 的效果在 nanocomposite peimanent 材料和改进模型的有效 anistropy 和磁性上的谷物尺寸和 microstnjcture 详细被讨论。 | SUN Yan GAO Ruwei HAN Baiping LIU Min HAN Guangbing FENG Weicun | 2007 | Progress in Natural Science:Materials International2007，17，2： | 0 |
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