| 磁场对NiMnGa单晶预相变温度的影响 |
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| 引用本文： | 崔玉亭.磁场对NiMnGa单晶预相变温度的影响[J].商丘师范学院学报,2007,23(6):52-56. |
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| 作者姓名： | 崔玉亭 |
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| 作者单位： | 商丘师范学院,物理与信息工程系,河南,商丘,476000 |
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| 基金项目： | 国家自然科学基金;河南省骨干教师培养对象资助项目 |
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| 摘 要： | 利用应变测量研究了外加恒定磁场对NiMnGa单晶预相变温度的影响,发现外加磁场使预相变温度向低温方向漂移,而且预相变温度漂移的程度与外加磁场的方向有关.依据前人的模型和我们的电子显微镜观察,目前的结果证实预相变过程中存在较强的磁弹相互作用;当外加磁场分别沿晶体的001]和010]两个等价的晶轴方向时,在010]方向上导致的磁弹相互作用更强.
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| 关 键 词： | 马氏体相变 预马氏体相变 温度 磁弹相互作用 |
| 文章编号： | 1672-3600（2007）06-0052-05 |
| 收稿时间： | 2007-03-12 |
| 修稿时间： | 2007-03-12 |
Influence of the magnetic field on the premartensitic phase transition temperature of NiMnGa single crystals |
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| CUI Yu-ting.Influence of the magnetic field on the premartensitic phase transition temperature of NiMnGa single crystals[J].Journal of Shangqiu Teachers College,2007,23(6):52-56. |
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| Authors: | CUI Yu-ting |
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| Institution: | Department of Physics, Shangqiu Teachers College, Shangqiu 476000, China |
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| Abstract: | The influence of the external magnetic field on the premartensitic phase transition temperature of NiMnGa single crystals is investigated by the strain measurements. It is found that the premartensitic phase transition temperature shifts down to the low temperature when an external magnetic is applied in measuring process, and the magnitude of the temperature shift is dependence on the direction of the external magnetic field. According to a previous model and our observation of the TEM, the present results confirm that the magnetoelastic interaction exists strongly during the premartensitic transition, and the magnitude of the magnetoelastic interaction in the 010 ] direction is stronger than that in the 001 ] direction. |
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| Keywords: | martensitic transformation premartensitic transition temperature magnetoelastic interaction |
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