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Structural and Magnetic Properties of Exchange Spring Type FePt/Fe Multilayers

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Abstract:

A series of [FePt(4min)/Fe(tFe)]10 multilayers were prepared by RF magnetron sputtering and post annealing. The structures, morphology, composition, and magnetic properties were measured by XRD, SEM, EDX and VSM. X-ray diffraction showed that lattice constants of FePt phase changed with Fe layer thickness and annealing temperature. Both a and c are smaller than the standard values and a decreases as the deposition time of Fe layer increases. The grain sizes of samples annealed at 500°C increase slightly, while those at 600°C increase sharply as Fe layer decreases. The coercivities decrease with the deposition time of Fe layer, and the energy product (BH)max reaches a maximum at Fe layer deposition time of 3 minutes.

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Periodical:

Materials Science Forum (Volumes 475-479)

Pages:

4013-4016

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.4013

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Online since:

January 2005

Authors:

You Son Gu, Xiao Yan Zhan, Jian He, Y. Zhang, Zhen Ji, Cheng Zhou

Keywords:

Exchange Spring, FePt/Fe Multilayers, Magnetic Property, Structural Observations

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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