Materials Transactions Online

Materials Transactions, Vol.54 No.03 (2013) pp.357-362
© 2013 The Japan Institute of Metals

Optical Microscopic Study on NiCoMnAl Metamagnetic Shape Memory Alloy by In Situ Observation under a Pulsed High Magnetic Field

Xiao Xu1, Ineko Katakura2, Takumi Kihara2, Masashi Tokunaga2, Wataru Ito3, Rie Y. Umetsu4 and Ryosuke Kainuma1

1Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
2International MegaGauss Science Laboratory, Institute for Solid State Physics, the University of Tokyo, Kashiwa 277-8581, Japan
3Department of Materials and Environmental Engineering, Sendai National College of Technology, Natori 981-1239, Japan
4Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

In situ microscopic study was carried out on Ni44.3Co5.1Mn31.4Al19.2 metamagnetic shape memory alloy under a pulsed magnetic field up to 35.5 T. Magnetic field-induced reverse martensitic transformation was directly observed. The critical magnetic fields were determined from the contrast change of the microstructure, where good agreement had been found by magnetization measurement in a previous study. Comparison of the micrographs during thermal and magnetic field cycles between Ni45Co5Mn36.7In13.3 and Ni44.3Co5.1Mn31.4Al19.2 was conducted. It is concluded that though the energy barrier related to thermal activation strongly effects the martensitic transformation of Ni45Co5Mn36.7In13.3, its effect is very small on Ni44.3Co5.1Mn31.4Al19.2. Qualitative discussion yielded a reasonable understanding of the results of microstructure observation.

(Received 2012/10/16; Accepted 2012/11/05; Published 2013/02/25)

Keywords: Heusler alloys, metamagnetic shape memory alloy, martensitic transformation, magnetic field-induced transformation, in situ observation, pulsed magnetic field

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REFERENCES

  1. R. Kainuma, Y. Imano, W. Ito, Y. Sutou, H. Morito, S. Okamoto, O. Kitakami, K. Oikawa, A. Fujita, T. Kanomata and K. Ishida: Nature 439 (2006) 957-960.
  2. V. K. Sharma, M. K. Chattopadhyay and S. B. Roy: Phys. Rev. B 76 (2007) 140401.
  3. W. Ito, K. Ito, R. Y. Umetsu, R. Kainuma, K. Koyama, K. Watanabe, A. Fujita, K. Oikawa, K. Ishida and T. Kanomata: Appl. Phys. Lett. 92 (2008) 021908.
  4. X. Xu, W. Ito, R. Y. Umetsu, K. Koyama, R. Kainuma and K. Ishida: Mater. Trans. 51 (2010) 469-471.
  5. X. Xu, W. Ito, M. Tokunaga, R. Y. Umetsu, R. Kainuma and K. Ishida: Mater. Trans. 51 (2010) 1357-1360.
  6. R. Y. Umetsu, K. Ito, W. Ito, K. Koyama, T. Kanomata, K. Ishida and R. Kainuma: J. Alloy. Compd. 509 (2011) 1389-1393.
  7. S. Kustov, M. L. Corro, J. Pons and E. Cesari: Appl. Phys. Lett. 94 (2009) 191901.
  8. S. Kustov, I. Golovin, M. Corró and E. Cesari: J. Appl. Phys. 107 (2010) 053525.
  9. W. Ito, R. Y. Umetsu, R. Kainuma, T. Kakeshita and K. Ishida: Scr. Mater. 63 (2010) 73-76.
  10. Y. Lee, M. Todai, T. Okuyama, T. Fukuda, T. Kakeshita and R. Kainuma: Scr. Mater. 64 (2011) 927-930.
  11. J. I. Pérez-Landazábalet, V. Recarte, V. Sánchez-Alarcos, S. Kustov, D. Salas and E. Cesari: Intermetallics 28 (2012) 144-148.
  12. A. K. Nayak, K. G. Suresh and A. K. Nigam: J. Appl. Phys. 109 (2011) 07A906.
  13. X. Xu, W. Ito, I. Katakura, M. Tokunaga and R. Kainuma: Scr. Mater. 65 (2011) 946-949.
  14. I. Katakura, M. Tokunaga, A. Matsuo, K. Kawaguchi, K. Kindo, M. Hitomi, D. Akahoshi and H. Kuwahara: Rev. Sci. Instrum. 81 (2010) 043701.
  15. http://www.material.tohoku.ac.jp/~seigyo/kai_lab/nicomnalimaging.html
  16. T. Krenke, E. Duman, M. Acet, E. Wassermann, X. Moya, L. Manosa and A. Planes: Nat. Mater. 4 (2005) 450-454.
  17. A. Seeger: Philos. Mag. 45 (1954) 771-773.
  18. W. F. Kocks: Progr. Mater. Sci. 19 (1975) 1.
  19. G. Ghosh and G. B. Olson: Acta Metall. Mater. 42 (1994) 3361-3370.
  20. G. Ghosh and G. B. Olson: Acta Metall. Mater. 42 (1994) 3371-3379.
  21. R. Y. Umetsu, K. Endo, A. Kondo, K. Kindo, W. Ito, X. Xu, T. Kanomata and R. Kainuma: Submitted to Mater. Trans.


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