Strain-induced magnetization change in patterned ferromagnetic nickel nanostructures

Alexandre Bur, Tao Wu, Joshua Hockel, Chin Jui Hsu, Hyungsuk K.D. Kim, Tien Kan Chung, Kin Wong, Kang L. Wang, Gregory P. Carman

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

We report strain-induced coercive field changes in patterned 300 ×100 ×35 nm3+ Ni nanostructures deposited on Si/SiO2 substrate using the magnetoelastic effect. The coercive field values change as a function of the applied anisotropy strain (∼1000 ppm) between 390 and 500 Oe, demonstrating that it is possible to gradually change the coercive field elastically. While the measured changes in coercive field cannot be accurately predicted with simple analytical predictions, fairly good agreement is obtained by using a micromagnetic simulation taking into account the influence of nonuniform strain distribution in the Ni nanostructures. The micromagnetic simulation includes a position dependant strain-induced magnetic anisotropy term that is computed from a finite element mechanical analysis. Therefore, this study experimentally corroborates the requirement to incorporate mechanical analysis into micromagnetic simulation for accurately predicting magnetoelastic effects in patterned ferromagnetic nanostructures.

Original languageEnglish
Article number123903
JournalJournal of Applied Physics
Volume109
Issue number12
DOIs
Publication statusPublished - 2011 Jun 15

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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