Synthesis of FePt Nanocubes Using Mo(Co)₆ as a Reducing Agent and their Magnetic Properties

Abstract:

FePt thin films with perpendicular c-axis orientation have potential for application as magnetic media for data storage, In order to be used as perpendicular magnetic storage media,The chemically synthesized cubic FePt nanoparticles is easier to assembed oriented nanoarray, especially the cubic FePt nanoparticles with shape anisotropy is expected to trigger magnetic anisotropy.In this study we provide a simple method to synthesize single crystalline FePt nanoparticles with cubic shapes.The key factor to formation of cubic morphology is using Mo (Co)₆ as a reducing agent. As-synthesized FePt nanocubes with size that are close to 7-10nm The self-assembly FePt nanocubes are chemically disordered with face centre cubic (fcc) structure where as after annealing these particles changed to face centre tetragonal (fct) ordered structure. The phase analysis, structure, and magnetic properties were determined by X-ray diffraction (XRD), High resolution transmission electron microscope (HRTEM), Scanning electron microscope (SEM) and vibrating sample magnetometer (VSM) techniques.

• Periodical: Advanced Materials Research (Volume 486)
• Pages: 412-416
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.486.412
• Online since: March 2012
• Authors: Ming Ge Zhou, Wei Li, Ming Gang Zhu, Dong Zhou, Yang Long Hou
• Keywords: FePt Nanocubes, Magnetic Material, Self-Assembly, Synthesis

References

[1] Y. J. Kang, X. C. Ye. X, C. B. Murray, Angew. Chem. Int. Ed. 2010, 49, 6156 –6159.

[2] M. Casavola, C. Falqui, M. A. Carc, C. Mar, C. Giannini, R. Cingolani, P. D. Cozzoli, Nano. Lett. 2009, 9, 366-376.

DOI: 10.1021/nl803151n

[3] R. F. Farrow, C. Weller, D. Marks, R. F. Toney, M. F. Cebollada, J. Appl. Phys. 1996, 79, 5967-5969.

[4] S. Sun, C.B. Murray, D. Weller, Liesl Folks, A. Moser, Science 287 (2000)(1989).

[5] Y. Hou, H. Kondoh, R. Che, M. Takeguchi, T. Ohta, Small, 2006, 2, 235-238.

[6] C. Wang, Y. L. Hou, J. Kim, S. H. Sun, Angew. Chem. 2007, 46, 6333-63335.

[7] Y. Hou, H. Kondoh, T. Ohta, Nanosci. Nanotechnol, 2009, 9, 202-208.

[8] E.K. Sato, Y. Hirotsu, Mater. Trans. 44 (2003) 1518.

[9] Y. J. Kang, X. C. Ye. X, C. B. Murray, Angew. Chem. Int. Ed. 2010, 49, 6156 –6159.

[10] B.H. Wu, N.F. Zheng, G. F, Chem Commum, 2011, 47, 1039-1041.

[11] L.J. Cote, F. Kim, J.X. Huang ,J. AM. CHEM. SOC. 2009, 131, 1043–1049.

[12] A. Dong, J. Chen, M. Patrick, M. J. Kikkawa, C. B. Murray, Nature. 2010, 466, 474-477.

[13] W. k. Koh, S.R. S, A.T. Fafarman, C.R. Kagan, C. B. Murray, Nano Lett. 2011, 11, 47.