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ACS Appl Mater Interfaces. 2017 Dec 13;9(49):43188-43196. doi: 10.1021/acsami.7b15433. Epub 2017 Dec 1.

Voltage Control of Two-Magnon Scattering and Induced Anomalous Magnetoelectric Coupling in Ni-Zn Ferrite.

Author information

1
Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Xi'an Jiaotong University , Xi'an 710049, China.
2
Collaborative Innovation Center of High-End Manufacturing Equipment, Xi'an Jiaotong University , Xi'an, 710049 Shaanxi, China.
3
Department of Chemistry and 4D LABS, Simon Fraser University , Burnaby, British Columbia V5A 1S6, Canada.
4
Materials Science Division, Argonne National Laboratory , 9700 Cass Avenue, Lemont, Illinois 60439, United States.

Abstract

Controlling spin dynamics through modulation of spin interactions in a fast, compact, and energy-efficient way is compelling for its abundant physical phenomena and great application potential in next-generation voltage controllable spintronic devices. In this work, we report electric field manipulation of spin dynamics-the two-magnon scattering (TMS) effect in Ni0.5Zn0.5Fe2O4 (NZFO)/Pb(Mg2/3Nb1/3)-PbTiO3 (PMN-PT) multiferroic heterostructures, which breaks the bottleneck of magnetostatic interaction-based magnetoelectric (ME) coupling in multiferroics. An alternative approach allowing spin-wave damping to be controlled by external electric field accompanied by a significant enhancement of the ME effect has been demonstrated. A two-way modulation of the TMS effect with a large magnetic anisotropy change up to 688 Oe has been obtained, referring to a 24 times ME effect enhancement at the TMS critical angle at room temperature. Furthermore, the anisotropic spin-freezing behaviors of NZFO were first determined via identifying the spatial magnetic anisotropy fluctuations. A large spin-freezing temperature change of 160 K induced by the external electric field was precisely determined by electron spin resonance.

KEYWORDS:

ferromagnetic resonance; magnetoelectric coupling; spin−lattice coupling; two-magnon scattering; voltage control of magnetism

PMID:
29171255
DOI:
10.1021/acsami.7b15433

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