Martensite Variant Reorientation of NiMnGa/Silicone Composites Containing Polystyrene Foam Particles

Abstract:

Effect of elastic modulus of matrix on ferromagnetic motion of NiMnGa particles was investigated for NiMnGa particles embedded silicone matrix composites with or without containing polystyrene form particles (PFPs), which are regarded as pores. NiMnGa single crystal was fabricated by a floating zone method and a cube-shape particle was fabricated with the surface orientation parallel to [100], [010] and [001] directions at the parent phase state. The elastic modulus of matrix polymer was controlled by changing the number of PFPs. It was found that the elastic modulus of silicone was decreased with increasing the volume fraction of PFPs. The magnetic-field-induced martensite variant reorientation (MVR) was evaluated by the magnetization curves obtained using a vibration sample magnetometer, and the magnetic field required for the start of martensite variant reorientation was reduced by increasing the number of PFPs. The control of elastic modulus of matrix polymer is important and a dominant factor for the magnetic motion of NiMnGa/polymer composites.

• Periodical: Advanced Materials Research (Volume 409)
• Pages: 645-650
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.409.645
• Online since: November 2011
• Authors: Yui Watanabe, Motoki Okuno, Yoshinaka Shimizu, Hiroyasu Kanetaka, Tomonari Inamura, Hideki Hosoda
• Keywords: Ferromagnetic Shape Memory Alloys (FSMAs), Martensite, Martensite Variant Reorientation, NiMnGa, Polymer Composite, Polystyrene

References

[1] K. Ullakko, J. K. Huang, C. Kantner, R.C. O'Handley and V.V. Kokorin: Appl. Phys. Lett. 69 (1996) p. (1966).

[2] S. J. Murray, M. Marioni, S. M. Allen, R. C. O'Handley and T. A. Lograsso: Appl. Phys. Lett. 77 (2000) p.886.

[3] A. Sozinov, A. A. Likhachev, N. Lanska and K. Ullakko: Appl. Phys. Lett. 80 (2002), p.1746.

[4] A. Sozinov, A. A. Likhachev, N. Lanska, K. Ullakko and V. K. Lindoors, Journal De Physique IV France, 112 (2003) p.955.

DOI: 10.1051/jp4:20031039

[5] K. Ullako, Y. Ezer, A Sozinov, G. Kimmel, P. Yakovenko, and V. K. Lindroos, Scripta Mater. 44 (2001) p.475.

DOI: 10.1016/s1359-6462(00)00610-2

[6] H. Hosoda, S. Takeuchi, K. Wakashima and S. Miyazaki, Trans. Mat. Res. Soc. Jpn., 28 (2003) 647-650.

[7] H. Hosoda, S. Takeuchi, T. Inamura, K. Wakashima, Science and Technology of Advanced Materials, 5 (2004) 503-510.

[8] H. Hosoda, S. Takeuchi, T. Inamura, K. Wakashima and S. Miyazaki, Mat. Sci. Forum, Vols. 475-479 (2005) 2067-(2070).

DOI: 10.4028/www.scientific.net/msf.475-479.2067

[9] B. Tian, F. Chen, Y. X. Tong, L. Li, Y. F. Zheng, Y. Liu, Journal of Alloys and Compounds, 505 (2010) p.680.

[10] N. Scheerbaum, D. Hinz, O. Gutfleisch, W. Skrotzki and L. Schultz, Journal of Appl. Phys. 101 (2007) 09C501.

[11] M. Zeng, S. W. Or and L. W. Chan, Journal of Applied Physics, 107 (2010) 09A942.

[12] N. Scheerbaum, D. Hinz, O. Gutfleisch, K. –H. Müller and L. Schultz, Acta Mater. 55 (2007) p.2707.

[13] K. Wakashima, private communication.