Large magnetostrictive susceptibility in Tb{endash}FeCo/FeCo multilayers
[Tb(Fe{sub 0.55}Co{sub 0.45}){sub 1.5}/Fe]{sub n} and [Tb(Fe{sub 0.55}Co{sub 0.45}){sub 1.5}/(Fe{sub 0.5}Co{sub 0.5})]{sub n} multilayers were fabricated by rf-magnetron sputtering from composite targets. Magnetostriction was measured using an optical deflectometer. The as-deposited films showed a soft magnetic and magnetostrictive character, with a coercive field {mu}{sub 0}H{sub c}=5 mT and a parallel magnetostrictive susceptibility {chi}{sub {lambda}{parallel}}=d{lambda}{sub {parallel}}/d({mu}{sub 0}H)=1.4{times}10{sup {minus}2} T{sup {minus}1}. This magnetostrictive softness was strongly improved by heat treatments: the magnetostrictive susceptibility attains the huge value of 5{times}10{sup {minus}2} T{sup {minus}1} in applied field of 6 mT. The low-field dependence of the magnetostrictive susceptibility and their technical characters are described in detail. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40203181
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 23 Vol. 78; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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