Sodium Doping Could Enhance the Room Temperature Ferromagnetism of (ZnO):Mn Diluted Magnetic Semiconductors

摘要

Zn_0.995-y Mn_0.005Na _y O (y = 0.00 to 0.010) nano-crystal powders are synthesized by a sol-gel method. All samples have ferromagnetism at room temperature and are composed of wurtzite ZnO with hexagonal structure without any secondary phases. The ferromagnetism is enhanced while 0.005 ≤ y ≤ 0.007 (Na:Mn = 1:1 to 1.4:1). The sample of Zn_0.988Mn_0.005Na_0.007O has the largest coercivity of 62.018GS; saturation magnetization of 1.751 × 10−2 μ _B/Mn; remain magnetization of 0.6055 × 10−3 μ _B/Mn and magnetic energy product of 1.53823μ _BGS/Mn. The ferromagnetic behavior can be attributed to the ferromagnetic exchange induced by bondage p-type carriers.View full textDownload full textKeywords(ZnO):Mn, diluted magnetic semiconductor, room temperature ferromagnetismRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10584587.2012.687335