Published June 25, 2018 | Version Author Accepted Manuscript
Journal article Open

Magnetoelectric metglas/bidomain y + 140°-cut lithium niobate composite for sensing fT magnetic fields

Creators

  • 1. National University of Science and Technology MISiS, 119049 Moscow, Russia & Department of Physics and I3N, University of Aveiro, 3810-193 Aveiro, Portugal
  • 2. Department of Physics and CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
  • 3. National University of Science and Technology MISiS, 119049 Moscow, Russia
  • 4. ITMO University, Laboratory "Materials and Structures for Electro- and Magnetocaloric Energy Conversion," 197101 St. Petersburg, Russia
  • 5. Department of Physics and CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal & ITMO University, Laboratory "Materials and Structures for Electro- and Magnetocaloric Energy Conversion," 197101 St. Petersburg, Russia

Description

We investigated the magnetoelectric properties of a new laminate composite material based on y + 140°-cut congruent lithium niobate piezoelectric plates with an antiparallel polarized “head-to-head” bidomain structure and metglas used as a magnetostrictive layer. A series of bidomain lithium niobate crystals were prepared by annealing under conditions of Li2O outdiffusion from LiNbO3 with a resultant growth of an inversion domain. The measured quasi-static magnetoelectric coupling coefficient achieved |αE31| = 1.9 V·(cm Oe)−1. At a bending resonance frequency of 6862 Hz, we found a giant |αE31| value up to 1704 V·(cm Oe)−1. Furthermore, the equivalent magnetic noise spectral density of the investigated composite material was only 92 fT/Hz1/2, a record value for such a low operation frequency. The magnetic-field detection limit of the laminated composite was found to be as low as 200 fT in direct measurements without any additional shielding from external noises.

Files

Turutin et al (AAM) - Appl. Phys. Lett. 112, 262906 (2018).pdf

Files (951.9 kB)

Additional details

Related works

Is previous version of
Journal article: 10.1063/1.5038014 (DOI)

Funding

SPINMULTIFILM – Physical principles of the creation of novel SPINtronic materials on the base of MULTIlayered metal-oxide FILMs for magnetic sensors and MRAM 778308
European Commission