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The FePt：MgO multi-layer nanocomposite thin films are deposited on MgO (100) substrates by using pulsed laser deposition method. The composition of FePt is Fe48Pt52. FePt nanoparticles (NPs) are embedded in MgO epitaxial layer periodically. The results of in-situ reflection high energy electron diffraction show that MgO epitaxial layers grow into the layer-by-layer mode and FePt NPs grow into the island mode. The alternation of the two growth modes is achieved in the whole deposition process. The high resolution transmission electron microscope results show that the phase of FePt is converted from the disordered face-centered cubic structure into the ordered face-centered tetragonal L10 structure after annealing. The perfect crystalline FePt NPs (around 5 nm in diameter) are flat-hexagonal in shape and array layer by layer on MgO matrix. The M-H loop of the film shows that the ordering degree and magnetism are enhanced after annealing.
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Keywords:
- pulsed laser deposition /
- reflection high energy electron diffraction /
- L10-FePt /
- phase transition
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[2] Qu S, Zhang X W, Yin Z G, You J B, Chen N F 2007 Chin. Phys. Lett. 24 3520
[3] Xia A L, Cao J W, Tong L N, Wei F L, Yang Z, Han B S 2007 Chin. Phys. Lett. 24 222
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[6] Duan C Y, Ma B, Wei F L, Zhang Z Z, Jin Q Y 2009 Chin. Phys. B 18 2565
[7] Ding Y F, Chen J S, Liu E 2005 Thin Solid Films 474 141
[8] Gao Y H 2011 Chin. Phys. B 20 107502
[9] Zhang L J, Cai J W, Meng F B, Li Y X 2006 Acta Phys. Sin. 55 450 (in Chinese) [张丽娇, 蔡建旺, 孟凡斌, 李养贤 2006 55 450]
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[11] Li B H, Huang F, Yang T, Feng C, Zhai Z H, Zhu F W 2005 Acta Phys. Sin. 54 3867 (in Chinese) [李宝河, 黄阀, 杨涛, 冯春, 翟中海, 朱逢吾 2005 54 3867]
[12] Feng C, Li B H, Han G, Teng J, Jiang Y, Liu Q L, Yu G H 2006 Acta Phys. Sin. 55 6656 (in Chinese) [冯春, 李宝河, 韩刚, 滕蛟, 姜勇, 刘泉林, 于广华 2006 55 6656]
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[14] Saito T, Kitakami O, Shimada Y 2002 J. Magn. Magn. Mater. 239 310
[15] Luo C P, Liou S H, Gao L, Liu Y, Sellmyer D J 2000 Appl. Phys. Lett. 77 2225
[16] Takahashi Y K, Homo K 2004 Appl. Phys. Lett. 84 383
[17] Cao J W, Katayama N, Yang Z, Wei F L, Matsumoto M, Morisako A, Liu X X, Takei S 2005 Chin. Phys. Lett. 22 2899
[18] Wu W D, Xu H, Wei S, Tang Y J, Chen Z H 2002 High Power Laser and Particle Beams 14 873 (in Chinese) [吴卫东, 许华, 魏胜, 唐永建, 陈正豪 2002 强激光与粒子束 14 873]
[19] Zuo Y S, Chen W Z, Liang W 2000 Modern Analysis Methods of Materials (Beijing: Beijing University of Technology Press) p212 (in Chinese) [左演声, 陈文哲, 梁伟 2000 材料现代分析方法 (北京: 北京工业大学出版社) 第212页]
[20] Wei X H 2005 Ph. D. Dissertation (Chengdu: University of Electronic Science and Technology of China) (in Chinese) [魏贤华 2005 博士学位论文 (成都: 电子科技大学)]
[21] Daeweritz L, Noetzel R, Ploog K H 1994 Spectroscopic Characterization Techniques for Semiconductor Technology V (Bellingham: SPIE) p114
[22] Ge F F 2010 Ph. D. Dissertation (Shanghai: TongjiUniversity) (in Chinese) [葛芳芳 2010 博士学位论文 (上海: 同济大学)]
[23] Chen S J, Ge F F, Ma Y J, Wang X M, Chen L Y, Han S J, Zhang H, Wang H B, Tang Y J, Wu W D 2012 J. Wuhan Univ. Technol. (Mater. Sci. Ed.) 26 897
[24] Kang K, Suzuki T, Zhang Z G, Papusoi C 2004 J. Appl. Phys. 95 7273
[25] Suzuki T, Zhang Z G, Singh A K, Yin J H, Perumal A, Osawa H 2005 J. Magn. Magn. Mater. 286 306
[26] Wei D H, You K L, Yao Y D, Chiang D P, Liou Y, Chin T S, Yu C C 2007 J. Magn. Magn. Mater. 310 753
[27] Li X L, Wang F, Jiang F X, Xu X H, Wu H S 2008 J. Univ. Sci. Technol. Beijing 15 173
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[1] Sun S H 2006 Adv. Mater. 18 393
[2] Qu S, Zhang X W, Yin Z G, You J B, Chen N F 2007 Chin. Phys. Lett. 24 3520
[3] Xia A L, Cao J W, Tong L N, Wei F L, Yang Z, Han B S 2007 Chin. Phys. Lett. 24 222
[4] Yin J H, Takao S, Pan L Q 2008 Chin. Phys. B 17 3907
[5] Weller D, Moser A, Folks L, Doerner M E 2000 IEEE Trans. Magn. 36 10
[6] Duan C Y, Ma B, Wei F L, Zhang Z Z, Jin Q Y 2009 Chin. Phys. B 18 2565
[7] Ding Y F, Chen J S, Liu E 2005 Thin Solid Films 474 141
[8] Gao Y H 2011 Chin. Phys. B 20 107502
[9] Zhang L J, Cai J W, Meng F B, Li Y X 2006 Acta Phys. Sin. 55 450 (in Chinese) [张丽娇, 蔡建旺, 孟凡斌, 李养贤 2006 55 450]
[10] Li B H, Feng C, Yang T, Zhai Z H, Teng J, Yu G H, Zhu F W 2006 Acta Phys. Sin. 55 2562 (in Chinese) [李宝河, 冯春, 杨涛, 翟中海, 滕蛟, 于广华, 朱逢吾 2006 55 2562]
[11] Li B H, Huang F, Yang T, Feng C, Zhai Z H, Zhu F W 2005 Acta Phys. Sin. 54 3867 (in Chinese) [李宝河, 黄阀, 杨涛, 冯春, 翟中海, 朱逢吾 2005 54 3867]
[12] Feng C, Li B H, Han G, Teng J, Jiang Y, Liu Q L, Yu G H 2006 Acta Phys. Sin. 55 6656 (in Chinese) [冯春, 李宝河, 韩刚, 滕蛟, 姜勇, 刘泉林, 于广华 2006 55 6656]
[13] Li B H, Feng C, Yang T, Zhai Z H, Teng J, Yu G H, Zhu F W 2006 Acta Phys. Sin. 55 2567 (in Chinese) [李宝河, 冯春, 杨涛, 翟中海, 滕蛟, 于广华, 朱逢吾 2006 55 2567]
[14] Saito T, Kitakami O, Shimada Y 2002 J. Magn. Magn. Mater. 239 310
[15] Luo C P, Liou S H, Gao L, Liu Y, Sellmyer D J 2000 Appl. Phys. Lett. 77 2225
[16] Takahashi Y K, Homo K 2004 Appl. Phys. Lett. 84 383
[17] Cao J W, Katayama N, Yang Z, Wei F L, Matsumoto M, Morisako A, Liu X X, Takei S 2005 Chin. Phys. Lett. 22 2899
[18] Wu W D, Xu H, Wei S, Tang Y J, Chen Z H 2002 High Power Laser and Particle Beams 14 873 (in Chinese) [吴卫东, 许华, 魏胜, 唐永建, 陈正豪 2002 强激光与粒子束 14 873]
[19] Zuo Y S, Chen W Z, Liang W 2000 Modern Analysis Methods of Materials (Beijing: Beijing University of Technology Press) p212 (in Chinese) [左演声, 陈文哲, 梁伟 2000 材料现代分析方法 (北京: 北京工业大学出版社) 第212页]
[20] Wei X H 2005 Ph. D. Dissertation (Chengdu: University of Electronic Science and Technology of China) (in Chinese) [魏贤华 2005 博士学位论文 (成都: 电子科技大学)]
[21] Daeweritz L, Noetzel R, Ploog K H 1994 Spectroscopic Characterization Techniques for Semiconductor Technology V (Bellingham: SPIE) p114
[22] Ge F F 2010 Ph. D. Dissertation (Shanghai: TongjiUniversity) (in Chinese) [葛芳芳 2010 博士学位论文 (上海: 同济大学)]
[23] Chen S J, Ge F F, Ma Y J, Wang X M, Chen L Y, Han S J, Zhang H, Wang H B, Tang Y J, Wu W D 2012 J. Wuhan Univ. Technol. (Mater. Sci. Ed.) 26 897
[24] Kang K, Suzuki T, Zhang Z G, Papusoi C 2004 J. Appl. Phys. 95 7273
[25] Suzuki T, Zhang Z G, Singh A K, Yin J H, Perumal A, Osawa H 2005 J. Magn. Magn. Mater. 286 306
[26] Wei D H, You K L, Yao Y D, Chiang D P, Liou Y, Chin T S, Yu C C 2007 J. Magn. Magn. Mater. 310 753
[27] Li X L, Wang F, Jiang F X, Xu X H, Wu H S 2008 J. Univ. Sci. Technol. Beijing 15 173
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