Electric-field controlled magnetic reorientation in exchange coupled CoFeB/Ni bilayer microstructures

Zhuyun Xiao, Roberto Lo Conte, Maite Goiriena, Rajesh V. Chopdekar, Xiang Li, Sidhant Tiwari, Charles Henri Lambert, Sayeef Salahuddin, Gregory P. Carman, Kang Wang, Jeffrey Bokor, Rob N. Candler

Research output: Contribution to journalConference articlepeer-review

Abstract

A novel strain-mediated composite multiferroic system is investigated in this work. The system is composed of magnetostrictive microstructures made of a ferromagnetic bilayer of negative magnetostrictive Ni and positive magnetostrictive CoFeB fabricated on a ferroelectric Pb(Mg1/3Nb2/3)0.69Ti0.31O3 (PMN-PT) single crystal substrate. When an electric field is applied across the PMN-PT substrate, magnetization reorientation occurs in the microstructures that are predominantly initialized into flux-closure states. An x-ray magnetic circular dichroism-photoemission electron microscope is used to experimentally visualize the electrically induced changes of the magnetization state of the individual layers as well as the exchange coupling between the two layers. Such heterostructures with tunable magnetoelectric properties have potential for new magnetic memory and sensor applications.

Original languageEnglish
Article number012024
JournalJournal of Physics: Conference Series
Volume1407
Issue number1
DOIs
Publication statusPublished - 2019 Dec 4
Event18th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, PowerMEMS 2018 - Daytona Beach, United States
Duration: 2018 Dec 42018 Dec 7

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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