期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 256, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2020.123692
关键词
Magnetoelectric heterostructure; Thin films; Magnetic measurements; X-ray diffraction
Ferroelectric-ferromagnetic [Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3](160 nm)/Ni0.8Zn0.2Fe2O4 (30 nm, 60 nm) bilayer thin films (abbreviated as (BZT-0.5BCT)/NZFO) have been grown on Pt/Si(100) substrate by pulse laser deposition techniques. X-ray diffraction analysis confirms polycrystalline nature of the films without any intermediate phase at the interface. The large value of dielectric constant (epsilon' similar to 2.03 x 10(3) at frequency 100 Hz) and remnant magnetization (Mr similar to 45.25 emu/cc) were observed at room temperature for (BZT-0.5BCT)/NZFO (60 nm) bilayer thin film. Bilayer (BZT-0.5BCT)/NZFO (30 nm) thin film exhibits saturated ferroelectric loop with large value of polarizations P-r similar to 5.57 mu C/cm(2) and P-s similar to 20 mu C/cm(2). The large value of ME coefficient (alpha(E) similar to 320 mV/cm.Oe) was obtained for (BZT-0.5BCT)/NZFO (30 nm) thin film at room temperature. This indicates its potential for lead-free ME device applications.
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