摘要(英) |
The Cu nanoparticles were fabricated by thermal evaporation method, and oxidized into Cu2O phase by a heating plate at atmosphere condition. The samples were named Cu20130316 O0 ~O4, according to the oxidation condition of the sample. The crystallographic composition of the sample and the corresponding lattice constants are obtained from X-ray diffraction pattern which is refined by General Structure Analysis System. The mean particle diameters of O0 ~O4 are determined by XRD peak profiles and AFM images.
Magnetization and magnetic ac susceptibility were measured by Physical Property Measurement System. The M-H curves of Cu20130316 O0 ~O4 can be described by a Langevin function, a Brillouin function, and a diamagnetic term. At low applied magnetic field regime the M-H curves of five samples reveal spin polarization effect, whereas Zeeman magnetization becomes predominantly at magnetic field larger than 1 kOe.
The saturation magnetization curves Ms of Cu and Cu2O nanoparticles do not change with temperature, indicating the ferromagnetic spin wave excitation does not come into play with polarized magnetic spins.
|
參考文獻 |
第一章
[1]丁展揚,氧化亞銅粉末與氮摻雜氧化亞銅薄膜之製備及性質研究,義守
大學碩士論文(2013)
[2]曾凱群,合成不同尺寸鉑奈米粒子以及在催化反應的應用,國立中正大
學碩士論文(2012)
[3] R. Kubo, Journal of the Physical Society of Japan
17,975(1962)
[4] A. Punnoose, H. Magnone, and M. S. Seehra ,
PhysRevB.64.174420(2001)
[5] Chao Liu and Z. John Zhang , Chem. Mater. 2001, 13,
2092-2096 (2001)
[6] H. Hori, T. Teranishi, Y. Nakae, Y. Seino, M. Miyake,
and S. Yamada,Phys. Lett. A 263, 406 (1999)
第二章
[1]銅氧核殼奈米顆粒的雙分量自旋極化,李宗儒,國立中央大學碩士論文(2006)
[2] A.C. Larson and R.B. Von Dreele, General Structure
Analysis System (GSAS), Los Alamos National Labaratory
Report LAUR 86-748(2004)
[3]工業雜誌 181期 91年 1月
[4]Scherrer, Nachr. Ges. Wiss. Gottingen, 1918, 26
September, 98-100.
[5]擬合X光繞射峰形判定奈米微粒粉末的粒徑分布,王進威,國立中央大學碩士論文
(2006)
[6]吳勝允、李文獻物理雙月刊二十八卷五期(2005)
[7]銅奈米微粒隨氧化程度對自旋極化的影響,苟穎書,國立中央大學碩士論文
(2013)
第三章
[1] C. Kittle, Introduction to Solid State Physics, 8 th,
(Wiley,UnitedStates,1976).
[2] C. Kittle, Introduction to Solid State Physics, 8 th,
(Wiley,UnitedStates,1976).
[3]吳勝允、李文獻 物理雙月刊 二十八卷五期 (2006)
[4] R. Aquino and J. Depeyrot,PRB 72, 184435 (2005)
[5] S.Morup and B.R.Hansen, Physical Review B 72, 024418
(2005)
[6] 吳政道,氧化亞銅奈米顆粒的熱縮現象探討,國立中央大學碩士論文
(2009)
第四章
[1] Matthew Trainer, Ferroelectrics and the Curie–Weiss law,
Eur. J. Phys. 21 (2000)
[2] Xuemin He,Wei Zhong ,Size dependence of the magnetic
properties of Ni nanoparticles prepared by thermal
decomposition method (2013)
|