|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Engineering of Soft Magnets for Power and Energy Applications
||Unique Magnetostriction of Fe68.8Pd31.2 Attributable to De-twinning Mechanism
||Jake Steiner, Abdellah Lisfi, Tomoyoki Kakeshita, Takashi Fukuda, Manfred Wuttig
|On-Site Speaker (Planned)
Fe68.8Pd31.2 exhibits an anomalously large magnetostriction of 400 ppm at room temperature as well as linear, isotropic, and hysteresis free magnetization behavior. This near perfectly reversible magnetic response is attributable to the presence of a large number of premartensitic twins present in the system made possible through the elastic softening that occurs near a martensitic transformation temperature of 250 K. It is proposed that the twins in the material reduce both elastic and magnetic self energy, causing the elastic and magnetic behavior of the material to be intimately linked. In such a framework, the anisotropy energy becomes extremely low causing the material to bear no crystalline dependence on magnetization, and application of a magnetic field causes simultaneous magnetic and twin domain movement, which, upon removal of the field, relaxes the system.
||Planned: Supplemental Proceedings volume