| 基于朗道二级相变理论的铁单晶磁结构分析 |
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| 引用本文： | 方贺男,陶志阔. 基于朗道二级相变理论的铁单晶磁结构分析[J]. 南京邮电大学学报(自然科学版), 2014, 0(1): 133-136 |
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| 作者姓名： | 方贺男 陶志阔 |
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| 作者单位： | 南京邮电大学电子科学与工程学院,江苏南京210023 |
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| 基金项目： | 江苏省自然科学基金（BK20130866）资助项目 |
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| 摘 要： | 利用朗道二级相变理论以及磁点群理论对于4种单晶铁,也就是阿尔法-铁、德尔塔-铁、伽马-铁以及伊普西龙-铁的磁结构进行了分析.其中,着重利用朗道二级相变理论中实现二级相变的条件和Birman的群选择定则来分析一定晶体结构的铁单晶如果发生顺磁铁磁相变后可能具有的空间对称性,进而得到铁单晶可能具有的磁结构.同时,得到的结论与之前文献报道中的结果进行了比较,发现符合得很好.
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| 关 键 词： | 朗道二级相变理论 磁点群 铁单晶磁结构 |
Analysis on Magnetic Structure of Single-Crystal Iron by Landau Theory of Second-Order Phase Transition |
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| FANG He-nan,TAO Zhi-kuo. Analysis on Magnetic Structure of Single-Crystal Iron by Landau Theory of Second-Order Phase Transition[J]. JJournal of Nanjing University of Posts and Telecommunications, 2014, 0(1): 133-136 |
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| Authors: | FANG He-nan TAO Zhi-kuo |
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| Affiliation: | 1.College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;) |
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| Abstract: | The magnetic structures of four kinds of single-crystal iron,i.e.,α-Fe,δ-Fe,γ-Fe,and ε-Fe,are analyzed by Landau theory of second-order phase transition and magnetic point group theory.The possible spatial symmetry of the single-crystal iron with a crystal structure is investigated if the paramagneticferromagnetic transition arises,using the condition of realizing the second-order transition of the Landau theory and the Birman＇ s group-theoretical selection rules.The possible magnetic structure of the singlecrystal iron can be obtained.Compared with the existing experimental results it is found that experimental results are in good agreement with our theoretical analyses. |
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| Keywords: | Landau theory of second-order phase transitions magnetic point group magnetic structures of single-crystal iron |
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