Strain-induced magnetization change in patterned ferromagnetic nickel nanostructures

  • Alexandre Bur
    University of California 1 Department of Mechanical and Aerospace Engineering, , Los Angeles, California 90095, USA
  • Tao Wu
    University of California 1 Department of Mechanical and Aerospace Engineering, , Los Angeles, California 90095, USA
  • Joshua Hockel
    University of California 1 Department of Mechanical and Aerospace Engineering, , Los Angeles, California 90095, USA
  • Chin-Jui Hsu
    University of California 1 Department of Mechanical and Aerospace Engineering, , Los Angeles, California 90095, USA
  • Hyungsuk K. D. Kim
    University of California 2 Department of Materials Science and Engineering, , Los Angeles, California 90095, USA
  • Tien-Kan Chung
    National Chiao Tung University 3 Department of Mechanical Engineering, , Hsinchu, Taiwan 300
  • Kin Wong
    University of California 4 Department of Electrical Engineering, , Los Angeles, California 90095, USA
  • Kang L. Wang
    University of California 4 Department of Electrical Engineering, , Los Angeles, California 90095, USA
  • Gregory P. Carman
    University of California 1 Department of Mechanical and Aerospace Engineering, , Los Angeles, California 90095, USA

書誌事項

公開日
2011-06-15
DOI
  • 10.1063/1.3592344
公開者
AIP Publishing

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説明

<jats:p>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.</jats:p>

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