Understanding the Role of Mode of Heating on Phase Formation of Fe–Pt Nanoparticles

  • S. A. AcharyaEmail author
  • A. Dani
  • S. K. Sayyed
  • V. M. Gaikawad
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 143)


In the present work, microwave heating route (MH) is used to prepare Fe–Pt nanoparticles and the results are compared with the materials obtained by conventional heating routes (CH). The effects of conditions of heating (microwave power, irradiation time, temperature) on the growth process of Fe–Pt nanoparticles are systematically investigated. The as-prepared Fe–Pt NPs by microwave heating route are observed in ordered face centered tetragonal (fct) L10 phase without any post-synthesis treatment, while conventional heating route gives rise to disordered face centered cubic (fcc) phase. The hysteresis measurements are performed at 300 K to study magnetic properties of as-synthesized Fe–Pt as a function of mode of heating and crystallite size. Conventionally, synthesized Fe–Pt (NPs) shows super paramagnetic behavior, while microwave-assisted sample exhibits ferromagnetic behavior. The particle size and magnetic properties of the as-prepared Fe–Pt are observed to be very sensitive to the preparative parameters such as microwave irradiation power and temperature, while influence of reaction time is insignificant. Size dependent magnetic behavior of microwave-assisted synthesized samples shows that coercivity and saturation magnetizations are observed to be decreasing with particle size. The microwave-assisted route is found to be a simple technique for direct synthesis of metal alloys and tuning particles size at nanoscale may prove to be a potential tool of high density data storage materials such as Fe–Pt.


Fe–Pt nanoparticles Microwave-heating L1o-phase Chemical reduction and tuning of particles size 



The authors also thank Dr. S. K. Kulkarni, Professor, IISER, Pune for magnetic characterization and Dr. R. M. Singru, Professor, IIT Kanpur for fruitful discussion and suggestion. This work is part of SAP programme, UGC, New Delhi.


  1. 1.
    S. Weller, A. Moser, Thermal effect limits in ultrahigh density magnetic recording. IEEE Trans. Magn. 35, 4423 (1999)CrossRefGoogle Scholar
  2. 2.
    J.A. Christodoulides, Y. Huang, Y. Zhang, G.C. Hadjipanayis, I. Panagiotopoulos, D. Niarchs, CoPt and Fe–Pt thin film for high density recording media. J. Appl. Phys. 87, 6938 (2000)CrossRefGoogle Scholar
  3. 3.
    D.L. Peng, T. Hihara, K. Sumiyama, Formation and magnetic properties of Fe–Pt alloys clusters by Plasma-gas condensation. Appl. Phys. Lett. 82, 350 (2003)CrossRefGoogle Scholar
  4. 4.
    S. Sun, Recent advances in chemical synthesis, self-assembly, and applications of Fe–Pt nanoparticles. Adv. Mater. 18, 393 (2006)Google Scholar
  5. 5.
    S. Sun, C.B. Murray, D. Weller, L. Folks, A. Moser, Monodisperse Fe–Pt nanoparticles and ferromagnetic Fe–Pt nanocrystal superlattices. Science 287, 1989 (2000)CrossRefGoogle Scholar
  6. 6.
    H. Zeng, J. Li, Z.L. Wang, J.P. Liu, S. Sun, Interparticle interactions in annealed Fe–Pt nanoparticle assemblies. IEEE Trans. Magn. 38, 2598 (2002)Google Scholar
  7. 7.
    H. Zeng, J. Li, J.P. Liu, Z.L. Wang, S.H. Sun, Exchange—coupled nanocomposite magnets by nanoparticles self- assembly. Nature. 420, 395 (2002)Google Scholar
  8. 8.
    H. Kodama, S. Monose, T. Sugimoto, T. Uzumaki, A. Tanaka, Chemically synthesized Fe–Pt nanoparticles material for ultrahigh density recording. IEEE Trans. Magn. 41, 665 (2005)CrossRefGoogle Scholar
  9. 9.
    B. Jeyadevan, A. Hobo, K. Urakawa, C.N. Chinnasamy, K. Shinoda, K. Tohji, Towards direct synthesis of fct-Fe–Pt nanoparticles by chemical route. J App. Phys. 93, 7574 (2001)CrossRefGoogle Scholar
  10. 10.
    B. Jeyadevan, Direct synthesis of fct-Fe–Pt nanoparticles by chemical route. Japan J. Appl. Phys 42, L350–L352 (2003)Google Scholar
  11. 11.
    K. Sata, B. Jeyadevan, K. Tojhi, Preparation and properties of ferromagnetic Fe–Pt dispersion. J. Magn. Magn. Mater. 266, 227 (2003)CrossRefGoogle Scholar
  12. 12.
    S. Kang, Z. Jia, S. Shi, D.E. Nikles, J.W. Harrell, Easy axis alignment of chemically partially ordered Fe–Pt nanoparticles. Appl. Phys. Lett. 86, 62503 (2005)Google Scholar
  13. 13.
    M. Howard, H.L. Nguyen, S.R. Giblin, B.K. Tanner, I. Terry, A.K. Hughes, O.S. Evans, A synthetic routes to size-controlled fcc and fct Fe–Pt nanoparticles. J. Am. Chem. Soc. 127, 10140 (2005)CrossRefGoogle Scholar
  14. 14.
    R. Minamia, Y. Kitamoto, T. Chikata, S. Kato, Direct synthesis of L10 type Fe–Pt nanoparticles using microwave-polyol method. Electrochim. Acta 51, 864 (2005)CrossRefGoogle Scholar
  15. 15.
    L. Colak, G.C. Hadjipanayis, Chemically synthesized Fe–Pt nanoparticles with controlled particle size, shape and composition. Nanotechnology 20, 485602 (2009)CrossRefGoogle Scholar
  16. 16.
    C. Rong, D. Li, J.P. Liu, V. Nandwana, N. Poudyal, Y. Ding, Z.L. Wang, H. Zeng, Size dependent chemical and magnetic ordering in LI0-Fe–Pt. Adv. Mater. 18, 2984 (2006)Google Scholar
  17. 17.
    V. Nandana, K.E. Elkins, N. Poudyal, G.S Chanbey, K. Yano, J.P. Liu, Size and shape control of monodisperse Fe–Pt nanoparticles. J. Phys. Chem. C. 111, 4185 (2007)Google Scholar
  18. 18.
    M. Chen, J.P. Liu, S. Sun, One step synthesis of Fe–Pt nanoparticles with tunable size. J. Am. Chem. Soc. 126, 8394 (2004)Google Scholar
  19. 19.
    H. Hu, H. Yang, P. Huang, D. Cui, Y. Peng, J. Zhang, F. Lu, J. Lian, D. Shi, Unique role of ionic liquid in microwave-assisted synthesis of monodisperse magnetic nanoparticles. Chem. Commun. 46, 3866 (2010)CrossRefGoogle Scholar
  20. 20.
    Y. Qing, W. Zhou, S. Jia, F. Juo, D. Zhu, Effect of heat treatment on the microwave electromagnetic properties of carbonyl iron/epoxy-silicone resine coatings. J. Mater. Sci. Technol. 26(11), 1011 (2010)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • S. A. Acharya
    • 1
    Email author
  • A. Dani
    • 2
  • S. K. Sayyed
    • 1
  • V. M. Gaikawad
    • 1
  1. 1.Department of PhysicsRTM Nagpur UniversityNagpurIndia
  2. 2.Department of Applied PhysicsPriyadarshini College of EngineeringNagpurIndia

Personalised recommendations