Hostname: page-component-76fb5796d-skm99 Total loading time: 0 Render date: 2024-04-25T22:48:51.167Z Has data issue: false hasContentIssue false
  • English
  • Français

Fabrication and characterization of freestanding NiMnGa films

Published online by Cambridge University Press:  01 February 2011

Holger Rumpf ,
Corneliu Craciunescu ,
Jürgen Feydt ,
Achim Gilles ,
Manfred Wuttig  and
Eckhard Quandt
Holger Rumpf
Affiliation:
Center of Advanced European studies and Research, Bonn, Germany
Corneliu Craciunescu
Affiliation:
Center of Advanced European studies and Research, Bonn, Germany Politehnica University of Timisoara, Romania
Jürgen Feydt
Affiliation:
Center of Advanced European studies and Research, Bonn, Germany
Achim Gilles
Affiliation:
Center of Advanced European studies and Research, Bonn, Germany
Manfred Wuttig
Affiliation:
Center of Advanced European studies and Research, Bonn, Germany Department of Materials Science, University of Maryland, College Park, MD, U.S.A.
Eckhard Quandt
Affiliation:
Center of Advanced European studies and Research, Bonn, Germany
Get access

Abstract

Freestanding Ni50Mn30Ga20 films of 13 μm thickness were fabricated by DC magnetron sputtering and analyzed. Magnetic measurements revealed the influence of the post deposition rapid thermal annealing process on the ferromagnetic hysteresis. Ferromagnetic properties evolved after annealing at 400°C. Thermal annealing of at least 600°C led to polycrystalline films that transformed reversibly and martensitically as shown by structural analysis and differential scanning calorimetry. Transformation temperatures and enthalpies of transformation of the martensitic transformation were strongly influenced by the temperature of the rapid annealing process. It is proposed that the annealing data reflect the evolution of the crystalline state.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 785: Symposium D – Materials and Devices for Smart Systems , 2003 , D7.2
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Webster, P.J., Ziebeck, K.R.A., Town, S.L., Peak, M.S., Philos. Mag. B 49, 295 (1984).10.1080/13642817408246515Google Scholar
2. Cherneko, V.A., Cesari, E., Kokorin, V.V., Vitenko, I.N., Scripta met. et mat. 33, 1239 (1995).10.1016/0956-716X(95)00370-BGoogle Scholar
3. Ullakko, K., Huang, J.K., Kokorin, V.V., O'Handley, R.C., Scripta Mater. 36, 1133 (1997).10.1016/S1359-6462(96)00483-6Google Scholar
4. James, R.D., Wuttig, M., Philos. Mag. A 77, 1273 (1998).10.1080/01418619808214252Google Scholar
5. Murray, S.J., Marioni, M., Allen, S.M., O'Handley, R.C., Appl. Phys. Lett. 77, 886 (2000).10.1063/1.1306635Google Scholar
6. Dong, J.W., Chen, L.C., Palmstrom, C.J., James, R.D., McKennan, S., Appl. Phys. Lett. 75, 1443 (1999).10.1063/1.125009Google Scholar
7. Wuttig, M., Craciunescu, C., Li, J., Mater. T. JIM 41, 933 (2000).10.2320/matertrans1989.41.933Google Scholar
8. Takeuchi, I., Famadou, O.O., Read, J.C., Aronova, M.A., Chang, K.S., Craciunescu, C., Lofland, S.E.. Wuttig, M., Wellstood, F., Knauss, L., Orozco, A., Nature Materials 2, 180 (2003).10.1038/nmat829Google Scholar
9. Rumpf, H., Feydt, J., Lewandowski, D., Ludwig, A., Winzek, B., Quandt, E., Zhao, P., Wuttig, M., Smart structures and Materials 2003, Proceedings of SPIE 5053, 191 (2003).10.1117/12.484689Google Scholar
10. Ohtsuka, M., Matsumoto, M., Itagaki, K., PRICM4 1661 (2001).Google Scholar
11. Wu, S.K., Tseng, K.H., Wang, J.Y., Thin Solid Films 408, 316 (2002).10.1016/S0040-6090(02)00134-7Google Scholar
12. Grummon, D.S., Gotthardt, R., Acta Mater. 48, 635 (2000).10.1016/S1359-6454(99)00401-2Google Scholar
13. LaGrange, T., Gotthardt, R., Scripta Mater. 50, 231 (2004).10.1016/j.scriptamat.2003.09.017Google Scholar
14. Craciunescu, C., Wuttig, M., Thin Solid Films 379, 173 (2000).10.1016/S0040-6090(00)01556-XGoogle Scholar
15. Wedel, B., Suzuki, M., Murakami, Y., Wedel, C., Suzuki, T., Shindo, D., Itagaki, K., J. Alloys Compd. 290, 137 (1999).10.1016/S0925-8388(99)00198-XGoogle Scholar
16. Besseghini, S., Pasquale, M., Passaretti, F., Sciacca, A., Villa, E., Scripta Mater. 44, 2681 (2001).10.1016/S1359-6462(01)00972-1Google Scholar