TY - JOUR
T1 - Electric-field controlled magnetic reorientation in exchange coupled CoFeB/Ni bilayer microstructures
AU - Xiao, Zhuyun
AU - Lo Conte, Roberto
AU - Goiriena, Maite
AU - Chopdekar, Rajesh V.
AU - Li, Xiang
AU - Tiwari, Sidhant
AU - Lambert, Charles Henri
AU - Salahuddin, Sayeef
AU - Carman, Gregory P.
AU - Wang, Kang
AU - Bokor, Jeffrey
AU - Candler, Rob N.
N1 - Funding Information:
The authors would like to thank J.D. Schneider and the Active Materials Lab at UCLA for the use of their electromagnet for device poling, and the use of fabrication facility at the Integrated Systems Nanofabrication Cleanroom and the AFM at the Nano and Pico Characterization both at the California NanoSystems Institute. We would also like to thank the Center for High Frequency Electronics at UCLA for the assistance with sample wire bonding. This work was supported by the National Science Foundation through the Cooperative Agreement Award EEC-1160504 for Solicitation NSF 11-537 (TANMS) managed by Dr. Deborah J. Jackson. The work at the Advanced Light Source at Lawrence Berkeley National Laboratory is supported by the Director, Office of Science, Office of Basic Energy Sciences, U.S. Department of Energy, under contract number DE-AC02-05CH11231.
PY - 2019/12/4
Y1 - 2019/12/4
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/1407/1/012024
DO - 10.1088/1742-6596/1407/1/012024
M3 - Conference article
AN - SCOPUS:85077820130
VL - 1407
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012024
T2 - 18th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, PowerMEMS 2018
Y2 - 4 December 2018 through 7 December 2018
ER -