Giant magnetostriction in an ordered Fe[sub 3]Pt single crystal exhibiting a martensitic transformation

Kakeshita, Tomoyuki; Takeuchi, Tetsuya; Fukuda, Takashi; Tsujiguchi, Masato; Saburi, Toshio; Oshima, Ryuichiro; Muto, Shunsuke
September 2000
Applied Physics Letters;9/4/2000, Vol. 77 Issue 10
Academic Journal
Magnetostriction measurements have been made in an ordered Fe[sub 3]Pt single crystal with degree of order of about 0.8, which exhibits a cubic-tetragonal martensitic transformation at 97 K. The specimen was cooled down to 4.2 K without magnetic field, and then a magnetic field of 4 T is applied to the specimen along <001> at 4.2 K and removed. As a result, a reversible giant magnetostriction of about 0.5% is observed. This reversible magnetostriction will be caused by the rearrangement of crystallographic domains, being three times as large as that of Terfenol-D (Fe[sub 2]Dy[sub x]Tb[sub 1-x]: typical magnetostrictive materials). © 2000 American Institute of Physics.


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