Abstract
Superparamagnetic face-centered cubic (fcc) FePt nanoparticles were synthesized using a polyol process. The effect of reaction temperature and molar ratio of Fe(CO)5 to Pt(acac)2 on the structure, composition and morphology of nanoparticles has been investigated. The optimum processing condition has been obtained for producing well-monodisperse fcc-phase FePt nanoparticles with the 2:1 molar ratio of Fe-Pt at 220 °C. In order to circumvent the problem of FePt particle coalescence during high temperature annealing for the L10 ordering, FePt nanoparticle/SiO2-matrix composite films have been fabricated by sol–gel method. The experimental results confirm that the amorphous SiO2 matrix effectively inhibits the grain growth and particle aggregation during 700 °C annealing for 1 h. Well-monodisperse face-centered tetragonal (fct) FePt particles embedded in the SiO2 matrix can be obtained with the long-range chemical order parameter S of ~0.74, indicating partially ordered L10 phase transition in FePt/SiO2 composite films. The FePt/SiO2 system exhibits a hysteretic behavior with smaller coercive field of 1,450 Oe. The incomplete phase transition from cubic deredat height maxsium (A 1-disordered phase to tetragonal L10-ordered phase) might be responsible for it.
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Sun SH, Murray CB, Weller D, Folks L, Moser A (2000) Science 287:1989
Weller D, Doerner MF (2000) Annu Rev Mater Sci 30:611
Perez JM, O’Loughin T, Simeone FJ, Weissleder R, Josephson L (2002) J Am Chem Soc 124:2856
Pouliquen D, Chouly C (1999) In: Arshady R (ed) Magnetic microcarriers for medical applications. Citus Books, London
Zhao M, Josephson L, Tang Y, Weissleder R (2003) Angew Chem Int Ed 42:1375
Zeng H, Li J, Liu JP, Wang ZL, Sun SH (2002) Nature 420:395
Lina XM, Samia ACS (2006) J Magn Magn Mater 305:100
Sun SH (2006) Adv Mater 18:393
Coffey KR, Parker MA, Howard JK (1995) IEEE Trans Magn 31:2737
Christodoulides JA, Bonder MJ, Huang Y, Zhang Y, Stoyanov S, Hadjipanayis GC, Simopoulos A, Weller D (2003) Phys Rev B 68:054428
Willoughby SD, MacLaren JM, Ohkubo T, Jeong S, McHenry M, Laughlin DE, Choi SJ, Kwon SJ (2002) J Appl Phys 91:8822
Yan Q, Purkayastha A, Singh AP, Li H, Li A, Ramanujan RV, Ramanath G (2009) Nanotechnology 20:025609
Rong CB, Li D, Nandwana V, Poudyal N, Ding Y, Wang ZL, Zeng H, Liu JP (2006) Adv Mater 18:2984
Chen M, Kim J, Liu JP, Fan HY, Sun SH (2006) J Am Chem Soc 128:7132
Nguyen HL, Howard LEM, Stinton GW, Giblin SR, Tanner BK, Terry I, Hughes AK, Ross IM, Serres A, Evans JSO (2006) Chem Mater 18:6414
Yamamoto S, Morimoto Y, Tamada Y, Takahashi YK, Hono K, Ono T, Takano M (2006) Chem Mater 18:5385
Nandwana V, Elkins KE, Poudyal N, Chaubey GS, Yano K, Liu JP (2007) J Phys Chem C 111:4185
Tomou A, Panagiotopoulos I, Gournis D, Kooi B (2007) J Appl Phys 102:023910
Weller D, Moser A, Folks L, Best ME, Lee W, Toney MF, Schwickert M, Thiele JU, Doerner MF (2000) IEEE Trans Magn 36:10
Muller M, Albe K (2005) Phys Rev B 72:094203
Chepulskii RV, Butler WH (2005) Phys Rev B 72:134205
Dai ZR, Sun SH, Wang ZL (2001) Nano Lett 1:443
Yan Q, Kim T, Purkayastha A, Ganesan PG, Shima M, Ramanath G (2005) Adv Mater 17:2233
Kang S, Harrell JW, Nikles DE (2002) Nano Lett 2:1033
Rong CB, Poudyal N, Chaubey GS, Nandwana V, Liu YZ, Wu YQ, Kramer MJ, Kozlov ME, Baughman RH, Liu JP (2008) J Appl Phys 103:07E131
Li D, Poudyal N, Nandwana V, Jin ZQ, Elkins K, Liu JP (2006) J Appl Phys 99:08E911
Yan Q, Purkayastha A, Kim T, Kroger R, Bose A, Ramanath G (2006) Adv Mater 18:2569
Lee DC, Mikulec FV, Pelaez JM, Koo B, Korgel BA (2006) J Phys Chem B 110:11160
Fan HY, Yang K, Boye DM, Sigmon T, Malloy KJ, Xu HF, Lopez GP, Brinker CJ (2004) Science 304:567
Klemmer TJ, Shukla N, Liu C, Wu XW, Svedberg EB, Mryasov O, Chantrell RW, Weller D, Tanase M, Laughlin DE (2002) Appl Phys Lett 81:2220
Heitsch AT, Lee DC, Korgel BA (2010) J Phys Chem C 114:2512
Kim KJ, Lee SJ, Wiener TA, Lynch DW (2001) J Appl Phys 89:244
Stahl B, Ellrich J, Theissmann R, Ghafari M, Bhattacharya S, Hahn H, Gajbhiye NS, Kramer D, Viswanath RN, Weissmuller J, Gleiter H (2003) Phys Rev B 67:14422
CC YuA, Mizuno M, Sasaki Y, Inoue M, Kondo H, Ohta I, Djayaprawira D, Takahashi M (2003) Appl Phys Lett 82:4352
Ethirajan A, Wiedwald U, Boyen HG, Han BKL, Klimmer A, Weigl F, Ka¨stle G, Fauth K, Cai J, RJ Behm, Romanyuk A, Oelhafen P, Walther P, Biskupek J, Kaiser U (2007) Adv Mater 19:406
Wang HB, Zhou MJ, Yang FJ, Wang J, Jiang Y, Wang Y, Wang H, Li Q (2009) Chem Mater 21:404
Chantrell RW, Weller D, Klemmer TJ, Sun S, Fullerton EE (2002) J Appl Phys 91:6866
Sharrock MP (1990) IEEE Trans Magn 26:193
Xu CJ, Yuan ZJ, Kohler N, Kim J, Maureen AC, Sun SH (2009) J Am Chem Soc 131:15346
Acknowledgments
This project was supported by the Natural Science Foundation of China (10974085, 10704035 and 50932001) and a grant from the State Key Program for Basic Research of China (2006CB921805, 2009ZX02039-004 and 2009CB929500). Aidong Li also thank the support from the program for the “333” Talents in Jiangsu Province and SRF for ROCS, SEM.
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Zhang, JL., Kong, JZ., Li, AD. et al. Synthesis and characterization of FePt nanoparticles and FePt nanoparticle/SiO2-matrix composite films. J Sol-Gel Sci Technol 64, 269–275 (2012). https://doi.org/10.1007/s10971-010-2373-8
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DOI: https://doi.org/10.1007/s10971-010-2373-8