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Unique magnetostriction of Fe_68.8Pd_31.2 attributable to twinning.

ABSTRACT: Fe_68.8Pd_31.2 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 magnetoelastic twin clusters present in the system made possible through the elastic softening that occurs near a martensitic transformation temperature of 252?K. It is proposed that the twin clusters in the material reduce both internal elastic and magnetic 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 relaxes the system.

SUBMITTER: Steiner J

PROVIDER: S-EPMC5043241 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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Unique magnetostriction of Fe68.8Pd31.2 attributable to twinning.

Steiner Jake J Lisfi Abdellah A Kakeshita Tomoyuki T Fukuda Takashi T Wuttig Manfred M

Scientific reports 20160930

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 magnetoelastic twin clusters present in the system made possible through the elastic softening that occurs near a martensitic transformation temperature of 252 K. It is proposed that the twin clu ...[more]

PMID: 27688053

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