spin dynamics, multiferroic heterostructure, non-volatile, magnetic anisotropy, spin wave switch
Motivated by the fast-developing spin dynamics in ferromagnetic/piezoelectric structures, this study attempts to manipulate magnons (spin-wave excitations) by the converse magnetoelectric (ME) coupling. Herein, electric field (E-field) tuning magnetism, especially the surface spin wave, is accomplished in Ni/0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) multiferroic heterostructures. The Kerr signal (directly proportional to magnetization) changes of Ni film are observed when direct current (DC) or alternative current (AC) voltage is applied to PMN-PT substrate, where the signal can be modulated breezily even without extra magnetic field (H-field) in AC-mode measurement. Deserved to be mentioned, a surface spin wave switch of "1" (i.e., "on" ) and "0" (i.e., "off" ) has been created at room temperature upon applying an E-field. In addition, the magnetic anisotropy of heterostructures has been investigated by E-field-induced ferromagnetic resonance (FMR) shift, and a large 490 Oe shift of FMR is determined at the angle of 45° between H-field and heterostructure plane.
XU, Hang; WANG, Bo; QI, Ji; LIU, Mei; TENG, Fei; HU, Linglong; ZHANG, Yuan; QU, Chaoqun; and FENG, Ming
"Modulation of spin dynamics in Ni/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructure,"
Journal of Advanced Ceramics: Vol. 11:
3, Article 9.
Available at: https://dc.tsinghuajournals.com/journal-of-advanced-ceramics/vol11/iss3/9