| 毫米级单晶Mn12-Ac磁性分子团簇的制备及表征 |
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| 引用本文： | 张丽娟,刘颖,冯爱霞,王平.毫米级单晶Mn12-Ac磁性分子团簇的制备及表征[J].北京化工大学学报(自然科学版),2005,32(4):73-76. |
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| 作者姓名： | 张丽娟 刘颖 冯爱霞 王平 |
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| 作者单位： | 北京化工大学理学院,北京,100029;中国科学院物理研究所极端条件物理实验室,北京,100080 |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | 文中详细介绍了毫米级Mn12-Ac单晶的制备方法。讨论了升温速率和恒温时间对晶体生长的影响，当以8min/℃的升温速率升温至55℃且保持30min时，获得了c轴方向长度为3mm左右的单晶。通过对晶体的X射线衍射（XRD）、等离子体发射光谱分析（ICP）以及磁滞回线测量，证实实验制备的晶体质量高，晶体缺陷少，可以更清晰地观察到宏观量子隧穿现象。
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| 关 键 词： | Mn12 晶体生长 分子磁体 分子团簇 磁滞回线 |
| 收稿时间： | 2004-09-24 |
| 修稿时间： | 2004年9月24日 |
Preparation and characterization of millimeter size Mn12-Ac nanomagnetic molecular cluster |
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| ZHANG Li-juan,LIU Ying,FENG Ai-xia,WANG Ping.Preparation and characterization of millimeter size Mn12-Ac nanomagnetic molecular cluster[J].Journal of Beijing University of Chemical Technology,2005,32(4):73-76. |
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| Authors: | ZHANG Li-juan LIU Ying FENG Ai-xia WANG Ping |
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| Institution: | 1. College of Science, Beijing University of Chemical Technology, Beijing 100029; 2. Key Laboratory of Extreme Conditions Physics, Institute of Physics, Chinese Academy of Science, Beijing 100080, China |
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| Abstract: | The method of preparing the millimeter size Mn12-Ac single crystal was introduced in this paper. The effect of the rate of temperature raising and the time of constant temperature on the crystal growth was investigated. It was found that the single crystal with the length of 3mm in the c direction could be prepared when the temperature was from 25℃ to 55℃ with the rate of 8min/℃ and kept 30min at 55℃. The Mn12-Ac single crystals were characterized by X-ray diffraction（XRD）, inductively coupled plasma atomic emission spectrometry(ICP)and magnetic measurement at low temperature. And the macroscopic quantum tunneling was observed more clearly by using these prepared samples. |
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| Keywords: | Mn12 crystal growth molecular magnets molecular cluster magnetic hysteresis curve |
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