| Pr_2(Co_(1-x)Mn_x)_(14)B和Pr_2(Fe_(1-x)Mn_x)_(14)B的结构和低温磁性 |
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| 引用本文： | 葛森林,张晓东,杨应昌.Pr_2(Co_(1-x)Mn_x)_(14)B和Pr_2(Fe_(1-x)Mn_x)_(14)B的结构和低温磁性[J].北京邮电大学学报,1991(2). |
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| 作者姓名： | 葛森林 张晓东 杨应昌 |
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| 作者单位： | 北京邮电学院基础部，北京大学物理系，北京大学物理系 |
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| 摘 要： | 本文研究了Pr_2(Co_(1-x)Mn_x)_(14)B 和 Pr_2(Fe_(1-x)Mn_x)14B 化合物的晶体结构和低温内禀磁性.在 x≤0.5时,可以形成2-14-1四方晶体结构.当 x 分别大于0.3和0.2时,Pr_2(Co_(1-x)Mn_x)_(14)B 和 Pr_2(Fe_(1-x)Mn_x)_(14)B 的居里温度 T_c 和饱和磁化强度σ_s 急剧减小.这两种化合物块状样品在1.5 K 的内禀矫顽力分别达到16 kOe 和22 kOe.内禀矫顽力既随成分变化,也随温度改变.低温特大矫顽力来源于窄畴壁能的涨落.
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| 关 键 词： | 畴壁 矫顽力 内禀磁性 |
Structure and Magnetic Properties of Pr_2(Co_(1-x) Mn-x)_(14) B and Pr_2(Fe_(1-x) Mn_x)_(14) B compounds at Cryogenic Temperature |
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| Ge Senlin.Structure and Magnetic Properties of Pr_2(Co_(1-x) Mn-x)_(14) B and Pr_2(Fe_(1-x) Mn_x)_(14) B compounds at Cryogenic Temperature[J].Journal of Beijing University of Posts and Telecommunications,1991(2). |
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| Authors: | Ge Senlin |
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| Abstract: | A large intrinsic coercive force iH_c of up to 16 kOe and 22kOe,respectively for Pr_2(Co_(1-x)Mn_x)_(14)B and Pr_2(Fe_(1-x)Mn_x)_(14)B has been observed at 1.5 K in as-cast bulk samples.It shows a composition dependence.The virgin magnetization curves with propagation field H_p indicate that the coercivity is created by domain wall pinning.The origin for the large intrinsic coercive force can be understood in terms of narrow domain walls. |
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| Keywords: | domain walls coercivc force intrinsic magnetism |
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