Journal
SCIENTIFIC REPORTS
Volume 4, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/srep03727
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Funding
- 973 project of the Ministry of Science and Technology of China [2009CB929202, 2009CB929203]
- National Nature Science Foundation of China [10721404, 11304385]
- Special Fund of Tsinghua for basic research [201110810625]
- Research Project of National University of Defense Technology [JC13-02-12]
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We report a giant electric-field control of magnetization (M) as well as magnetic anisotropy in a Co40Fe40B20(CoFeB)/Pb(Mg1/3Nb2/3)(0.7)Ti0.3O3(PMN-PT) structure at room temperature, in which a maximum relative magnetization change (Delta M/M) up to 83% with a 90 degrees rotation of the easy axis under electric fields were observed by different magnetic measurement systems with in-situ electric fields. The mechanism for this giant magnetoelectric (ME) coupling can be understood as the combination of the ultra-high value of anisotropic in-plane piezoelectric coefficients of (011)-cut PMN-PT due to ferroelectric polarization reorientation and the perfect soft ferromagnetism without magnetocrystalline anisotropy of CoFeB film. Besides the giant electric-field control of magnetization and magnetic anisotropy, this work has also demonstrated the feasibility of reversible and deterministic magnetization reversal controlled by pulsed electric fields with the assistance of a weak magnetic field, which is important for realizing strain-mediated magnetoelectric random access memories.
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