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Exchange Spring Type Magnet Realized in FePt/Fe Multilayers Deposited by Magnetron Sputtering

Published online by Cambridge University Press:  01 February 2011

Yousong Gu ,
Dayong Zhang ,
Xiaoyuan Zhan ,
Zhen Ji ,
Xiaolan Zhen  and
Yue Zhang
Yousong Gu
Affiliation:
Department of Material Physics, University of Science and Technology in Beijing Beijing 100083, People's Republic of China
Dayong Zhang
Affiliation:
Department of Material Physics, University of Science and Technology in Beijing Beijing 100083, People's Republic of China
Xiaoyuan Zhan
Affiliation:
Department of Material Physics, University of Science and Technology in Beijing Beijing 100083, People's Republic of China
Zhen Ji
Affiliation:
Department of Material Physics, University of Science and Technology in Beijing Beijing 100083, People's Republic of China
Xiaolan Zhen
Affiliation:
Department of Material Physics, University of Science and Technology in Beijing Beijing 100083, People's Republic of China
Yue Zhang
Affiliation:
Department of Material Physics, University of Science and Technology in Beijing Beijing 100083, People's Republic of China
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Abstract

Series of FePt/Fe multilayers with different layer thicknesses have been deposited on Si substrates by magnetron sputtering and post annealing at different temperatures and durations. The structure, surface morphology, composition, and magnetic properties of the deposited films have been characterized by XRD, SEM, EDX and VSM. It is found that after annealing at temperatures above 500°C, FePt phase undergoes a phase transition from disorder fcc into ordered fct structure, and become a hard magnetic phase. For [FePt/Fe]n multilayer with varying Fe layer thickness, lattice constants and grain sizes change with Fe layer thickness and annealing temperature. The coercivities of [FePt/Fe]n multilayers decrease with Fe layer deposition time, and the energy product (BH)max shows a maximum with Fe layer thickness. Optimization on layer thickness leads a high (BxH)max value of 15.2MGOe for [FePt(8min)/Fe(4min)]8. The effects of quick annealing and Ag underlayer on the structure and magnetic properties were also studied.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 872: Symposium J – Micro- and Nanosystems—Materials and Devices , 2005 , J4.3
Copyright
Copyright © Materials Research Society 2005

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References

[1] Kneller, E.F., Hawig, R., IEEE trans. Magn. 27, 3588, (1991).Google Scholar
[2] Jiang, J.S. and Bader, S.D., Mater. Sci. Tech. 17, 1491 (2001).Google Scholar
[3] Skomski, R. and Coey, J.M., Phys. Rev. B 48, 15812 (1993).Google Scholar
[4] Yung, S. W., Lin, Y.H., and Hung, M.H., J. Magn. Mang. Mater. 116, 411 (1992).Google Scholar
[5] Suzuki, T., Muraoka, H., Nakamura, Y. and Ouchi, K., IEEE Trans. Magn., 39, 691 (2003).Google Scholar
[6] Sakuma, H., Nishio, H., Kitamoto, Y., Yamazaki, Y., Yamamoto, H., IEEE Trans. Magn., 39, 2758 (2003).Google Scholar
[7] Shima, T., Takanashi, K., Takahashi, Y.K. and Hono, K., Appl. Phys. Lett., 85, 2571 (2004).Google Scholar
[8] Lim, B.C., Chen, J.S., Wang, J.P., J. Magn. Magn. Mater., 271, 431 (2004).Google Scholar
[9] Sabiryanov, R.F., Jaswal, S.S., J. Magn. Magn. Mater. 177-181, 980 (1998).Google Scholar
[10] Kuo, C.M., Kuo, P.C. and Wu, H.C., Yao, Y.D. and Lin, C.H., J. Appl. Phys. 85, 4886 (1999).Google Scholar
[11] Liu, J.P., Luo, C.P., Liu, Y. and Sellmyer, D.J., Appl. Phys. Lett. 73, 483 (1998).Google Scholar
[12] Zeng, H., Li, J., Liu, J.P., Wang, Z.L. and Sun, S., Nature 420, 395 (2002).Google Scholar