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A Novel Nanoelectromagnetic System Using Multiferroic/Magnetoelectric Ni-Nano-Chevron/PMN-PT Heterostructure to Demonstrate an Electric-Field-Controlled Permanent Magnetic Single-Domain Transformation

[+] Author Affiliations
Chih-Cheng Cheng, Shin-Hung Lin, Yu-Jen Chen, Hsin-Min Wang, Hou-Jen Chu, Chiao-Fang Hung, Po-Jung Lin, Tien-Kan Chung

National Chiao Tung University, Hsinchu, Taiwan

Paper No. ISPS-MIPE2018-8502, pp. V001T08A001; 3 pages
doi:10.1115/ISPS-MIPE2018-8502
From:
  • ASME-JSME 2018 Joint International Conference on Information Storage and Processing Systems and Micromechatronics for Information and Precision Equipment
  • ASME-JSME 2018 Joint International Conference on Information Storage and Processing Systems and Micromechatronics for Information and Precision Equipment
  • San Francisco, California, USA, August 29–30, 2018
  • Conference Sponsors: Information Storage and Processing Systems Division
  • ISBN: 978-0-7918-5193-7
  • Copyright © 2018 by ASME

abstract

In this paper, we report a novel nanoelectromagnetic system using multiferroic/magnetoelectric Ni-nano-chevron/PMN-PT heterostructure to demonstrate an electric-field-controlled permanent magnetic single-domain transformation. The heterostructure consists of a magnetostrictive Ni-nano-chevron, Pt top and bottom electrodes, and a piezoelectric PMN-PT substrate. In initial state (as demagnetized), the magnetization of the magnetic single-domain is stably along the long axis of the nano-chevron. A magnetic field of 3000 Oe (along 45 degree of nano-chevron) is applied to magnetize the Ni-nano-chevron from stable single-domain to metastable two-domains. After this, an electric field of 0.8MV/m is applied to the PMN-PT substrate to produce the converse magnetoelectric effect to transform the two-domains. After the electric field is removed, the two-domains are further transformed back to the single-domain. Finally, when comparing the domains before and after applying our approach, approximately 50 % of single-domains are successfully and permanently switched (i.e., magnetization-direction is permanently rotated 180 degrees).

Copyright © 2018 by ASME

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