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Modulation of Spin Dynamics via Voltage Control of Spin‐Lattice Coupling in Multiferroics
Author(s) -
Zhu Mingmin,
Zhou Ziyao,
Peng Bin,
Zhao Shishun,
Zhang Yijun,
Niu Gang,
Ren Wei,
Ye ZuoGuang,
Liu Yaohua,
Liu Ming
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201605598
Subject(s) - magnonics , condensed matter physics , multiferroics , ferromagnetic resonance , spin wave , materials science , physics , spin hall effect , ferromagnetism , spin polarization , electron , magnetic field , optoelectronics , quantum mechanics , ferroelectricity , magnetization , dielectric
Motivated by the most recent progresses in both magnonics (spin dynamics) and multiferroics fields, this work aims at magnonics manipulation by the magnetoelectric coupling effect. Here, voltage control of magnonics, particularly the surface spin waves, is achieved in La 0.7 Sr 0.3 MnO 3 /0.7Pb(Mg 1/3 Nb 2/3 )O 3 ‐0.3PbTiO 3 multiferroic heterostructures. With the electron spin resonance method, a large 135 Oe shift of surface spin wave resonance (≈7 times greater than conventional voltage‐induced ferromagnetic resonance shift of 20 Oe) is determined. A model of the spin‐lattice coupling effect, i.e., varying exchange stiffness due to voltage‐induced anisotropic lattice changes, has been established to explain experiment results with good agreement. Additionally, an “on” and “off” spin wave state switch near the critical angle upon applying a voltage is created. The modulation of spin dynamics by spin‐lattice coupling effect provides a platform for realizing energy‐efficient, tunable magnonics devices.