title: Enhanced Resonance Magnetoelectric Coupling in (1-1) Connectivity Composites.
abstract: Bulk-magnetoelectric (ME) composites consisting of various piezoelectric and piezomagnetic materials with (3-0), (3-1), (2-2), and (2-1) connectivity are proposed in a bid to realize strong ME coupling for next-generation electronic-device applications. Here, 1D (1-1) connectivity ME composites consisting of a [011]-oriented Pb(Mg,Nb)O3-PbTiO3(PMN-PT) single-crystal fiber laminated with laser-treated amorphous FeBSi alloy (Metglas) and operating in L-T mode (longitudinally magnetized and transversely poled) are reported, which exhibit an enhanced resonant ME coupling coefficient of ≈7000 V cm-1Oe-1, which is nearly seven times higher than the best result published previously, and also a superhigh magnetic sensitivity of 1.35 × 10-13T (directly detected) at resonance at room temperature, representing a significant advance in bulk magnetoelectric materials. The theoretical analyses based on magnetic-circuit and equivalent-circuit methods show that the enhancement in ME coupling can be attributed to the reduction in resonance loss of laser-treated Metglas alloy due to nanocrystallization and the strong magnetic-flux-concentration effect in (1-1) configuration composites.
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, 100871, Beijing, China.
authors.forename: Zhaoqiang
authors.initials: Z
authors.lastname: Chu
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, 100871, Beijing, China.
authors.forename: Huaduo
authors.initials: H
authors.lastname: Shi
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, 100871, Beijing, China.
authors.forename: Weiliang
authors.initials: W
authors.lastname: Shi
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, 100871, Beijing, China.
authors.forename: Guoxi
authors.initials: G
authors.lastname: Liu
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, 100871, Beijing, China.
authors.forename: Jingen
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, 100871, Beijing, China.
authors.forename: Jikun
authors.initials: J
authors.lastname: Yang
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, 100871, Beijing, China.
authors.forename: Shuxiang
authors.initials: S
authors.lastname: Dong
keywords: flux-concentration effect; laser treatment; magnetic sensors; magnetoelectric