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Variable SAW delay line using amorphous TbFe2film

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4 Author(s)
Yamaguchi, M. ; Chiba University, Chiba-Chi, Japan ; Hashimoto, K.Y. ; Kogo, H. ; Naoe, M.

This paper describes a large SAW velocity change obtained in a delay line consisting of an amorphous TbFe2film on a LiNbO3substrate. When an external bias field of about 4 kOe was applied parallel to the direction of SAW propagation, the percentage velocity change attained was -0.27 %. The value of this change is several times as large as that previously reported. The delay line may be used for trimming a small amount of delay time and tuning oscillation frequencies in an SAW oscillator.

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Magnetics, IEEE Transactions on  (Volume:16 ,  Issue: 5 )