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The pure phase BiFeO3 nanoparticles with different sizes are prepared by an ethylenediaminetetraacetic acid complexing sol-gel process. The structure, the morphology and the magnetic properties of BiFeO3 nanoparticles are characterized by X-ray diffractometry, scanning electron microscopy, superconducting quantum interference device magnetometer and Mossbauer spectra analysis. The results show that the BiFeO3 nanoparticle possesses an weak ferromagnetism at room temperature with a strongly size-dependent property. It reflects that the weak ferromagnetism present in the BiFeO3 nanoparticle should be attributed to the grain size-confinement effect, rather than the existence of the magnetic impurity or Fe2+.
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Keywords:
- BiFeO3 /
- nanoparticles /
- magnetic properties /
- size-confinement effects
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[2] Eerenstein W, Mathur N D, Scott J F 2006 Nature 442 759
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[7] Palkar V R, Ganesh Kumara K, Malik S K 2004 Appl. Phys. Lett.84 2856
[8] Yang C H, Koo T Y, Jeong Y H 2005 Solid State Commun. 134299
[9] Mazumder R, Sujatha Devi P, Dipten Bhattacharya, Choudhury P,Sen A, Raja M 2007 Appl. Phys. Lett. 91 062510
[10] Rovillain P, De Sousa R, Gallais Y, Sacuto A, Méasson M A, ColsonD, Forget A, Bibes M, Barthélémy A, Cazayous M 2010 NatureMaterials 9 975
[11] Sun Y, Huang Z F, Fan H G, Ming X, Wang C Z, Chen G 2009Acta Phys. Sin. 58 193 (in Chinese) [孙源, 黄祖飞, 范厚刚, 明星, 王春忠, 陈岗 2009 58 193]
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[13] Lubk A, Gemming S, Spaldin N A 2009 Phys. Rev. B 80 104110
[14] Ederer C, Spaldin N A 2005 Phys. Rev. B 71 060401(R)
[15] Ederer C, Spaldin N A 2005 Phys. Rev. B 71 224103
[16] Selbach S M, Tybell T, Einarsrud M, Grande T 2007 Chem. Mater.19 6478
[17] Park T J, Papaefthymiou G C, Viescas A J, Moodenbaugh A R,Wong S S 2007 Nanoletters 7 763
[18] Wei J, Xue D S, Xu Y 2008 Scripta Mater. 58 45
[19] Vijayanand S, Potdar H S, Joy P A 2009 Appl. Phys. Lett. 94182507
[20] Wei J, Xue D S 2008 Mater. Res. Bull. 43 3368
[21] Neel L 1961 Compt. Rend. 252 9
[22] Neel L 1961 Compt. Rend. 252 4075
[23] Neel L 1961 Compt. Rend. 253 203
[24] Richardson J T, Yiagas D I, Turk B, Forster K, Twigg M V 1991J. Appl. Phys. 70 6977
[25] Blaauw C, van der Woude F 1973 J. Phys. C 6 1422
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[1] Fiebig M 2005 J. Phys. D 38 R123
[2] Eerenstein W, Mathur N D, Scott J F 2006 Nature 442 759
[3] Bucci J D, Robertson B K, James W J 1972 J. Appl. Cryst. 5 187
[4] Sosnowska I, Peterlin-Neumaier T, Streichele E 1982 J. Phys. C15 4835
[5] Kumar M M, Palkar V R, Srinivas K, Suryanarayana S V 2000Appl. Phys. Lett. 76 2764
[6] Wang J, Neaton J B, Zheng H, Nagarajan V, Ogale S B, LiuB, Viehland D, Vaithyanathan V, Schlom D G, WaghmareU V,Spaldin N A, Rabe K M, Wuttig M, Ramesh R 2003 Science 2991719
[7] Palkar V R, Ganesh Kumara K, Malik S K 2004 Appl. Phys. Lett.84 2856
[8] Yang C H, Koo T Y, Jeong Y H 2005 Solid State Commun. 134299
[9] Mazumder R, Sujatha Devi P, Dipten Bhattacharya, Choudhury P,Sen A, Raja M 2007 Appl. Phys. Lett. 91 062510
[10] Rovillain P, De Sousa R, Gallais Y, Sacuto A, Méasson M A, ColsonD, Forget A, Bibes M, Barthélémy A, Cazayous M 2010 NatureMaterials 9 975
[11] Sun Y, Huang Z F, Fan H G, Ming X, Wang C Z, Chen G 2009Acta Phys. Sin. 58 193 (in Chinese) [孙源, 黄祖飞, 范厚刚, 明星, 王春忠, 陈岗 2009 58 193]
[12] Wang J W, Zhang Y, Jiang P, Tang W H 2009 Acta Phys. Sin. 584199 (in Chinese) [王君伟, 张勇, 姜平, 唐为华 2009 58 4199]
[13] Lubk A, Gemming S, Spaldin N A 2009 Phys. Rev. B 80 104110
[14] Ederer C, Spaldin N A 2005 Phys. Rev. B 71 060401(R)
[15] Ederer C, Spaldin N A 2005 Phys. Rev. B 71 224103
[16] Selbach S M, Tybell T, Einarsrud M, Grande T 2007 Chem. Mater.19 6478
[17] Park T J, Papaefthymiou G C, Viescas A J, Moodenbaugh A R,Wong S S 2007 Nanoletters 7 763
[18] Wei J, Xue D S, Xu Y 2008 Scripta Mater. 58 45
[19] Vijayanand S, Potdar H S, Joy P A 2009 Appl. Phys. Lett. 94182507
[20] Wei J, Xue D S 2008 Mater. Res. Bull. 43 3368
[21] Neel L 1961 Compt. Rend. 252 9
[22] Neel L 1961 Compt. Rend. 252 4075
[23] Neel L 1961 Compt. Rend. 253 203
[24] Richardson J T, Yiagas D I, Turk B, Forster K, Twigg M V 1991J. Appl. Phys. 70 6977
[25] Blaauw C, van der Woude F 1973 J. Phys. C 6 1422
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