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Mn和N共掺ZnO稀磁半导体薄膜的研究
引用本文:邹文琴,路忠林,王申,刘圆,陆路,郦莉,张凤鸣,都有为. Mn和N共掺ZnO稀磁半导体薄膜的研究[J]. 物理学报, 2009, 58(8): 5763-5767. DOI: 10.7498/aps.58.5763
作者姓名:邹文琴  路忠林  王申  刘圆  陆路  郦莉  张凤鸣  都有为
作者单位:(1)东南大学物理系,南京 210096; (2)南京大学物理系,固体微结构物理国家实验室,南京 210093
基金项目:国家自然科学基金 (批准号: 10804017, 50802041)和教育部新世纪优秀人才支持计划(批准号: NCET-05-0452)资助的课题.
摘    要:使用对Zn2N3:Mn薄膜热氧化的方法成功制备了高含N量的Mn和N共掺ZnO的稀磁半导体薄膜.在没有N离子共掺的情况下,ZnO:Mn薄膜的铁磁性非常微弱;如果进行N离子的共掺杂,就会发现ZnO:Mn薄膜在室温下表现出非常明显的铁磁性,饱和离子磁矩为0.23 μB—0.61 μB.这说明N的共掺激发了ZnO:Mn薄膜中的室温铁磁性,也就是受主的共掺引起的空穴有利于ZnO中二价Mn离子的铁磁性耦合,这和最近的相关理论研究符合很好.关键词:磁性半导体受主掺杂空穴媒介的铁磁性

关 键 词:磁性半导体  受主掺杂  空穴媒介的铁磁性
收稿时间:2008-11-21

Activation of room-temperature ferromagnetism in Mn doped ZnO thin films by N codoping
Zou Wen-Qin,Lu Zhong-Lin,Wang Shen,Liu Yuan,Lu Lu,Li Li,Zhang Feng-Ming,Du You-Wei. Activation of room-temperature ferromagnetism in Mn doped ZnO thin films by N codoping[J]. Acta Physica Sinica, 2009, 58(8): 5763-5767. DOI: 10.7498/aps.58.5763
Authors:Zou Wen-Qin  Lu Zhong-Lin  Wang Shen  Liu Yuan  Lu Lu  Li Li  Zhang Feng-Ming  Du You-Wei
Abstract:Mn doped ZnO films with and without N codoping have been fabricated by oxidative annealing of sputtered Zn:Mn and Zn2N3:Mn films on silicon substrates in flowing O2 ambient. It was found that the ZnO:Mn films show very weak ferromagnetic behavior, while for those with N codoping, significant ferromagnetism with a moderate saturation magnetization of about 0.23—0.61 μB per Mn2+ ion was observed at room temperature. It suggests that significant ferromagnetism in ZnO:Mn films could be activated by N codoping. The results indicate that holes are favorable for ferromagnetic ordering of the doped Mn2+ ions in ZnO, in agreement with the recent theoretical studies.
Keywords:magnetic semiconductor  p-type conduction  hole-mediated ferromagnetism
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