Control of magnetic relaxation by electric-field-induced ferroelectric phase transition and inhomogeneous domain switching
Abstract
Electric-field modulation of magnetism in strain-mediated multiferroic heterostructures is considered a promising scheme for enabling memory and magnetic microwave devices with ultralow power consumption. However, it is not well understood how electric-field-induced strain influences magnetic relaxation, an important physical process for device applications. Here, we investigate resonant magnetization dynamics in ferromagnet/ferroelectric multiferroic heterostructures, FeGaB/PMN-PT and NiFe/PMN-PT, in two distinct strain states provided by electric-field-induced ferroelectric phase transition. The strain not only modifies magnetic anisotropy but also magnetic relaxation. In FeGaB/PMN-PT, we observe a nearly two-fold change in intrinsic Gilbert damping by electric field, which is attributed to strain-induced tuning of spin-orbit coupling. By contrast, a small but measurable change in extrinsic linewidth broadening is attributed to inhomogeneous ferroelastic domain switching during the phase transition of the PMN-PT substrate.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 04, 2016
- Source ID
- 10.1063/1.4939441
Entities
People
- Bin Peng
- Brandon M. Howe
- David Budil
- Gail J. Brown
- Haosu Luo
- Hwaider Lin
- Jie Jiao
- John G Jones
- Li Xie
- Ming Liu
- Nian X. Sun
- Satoru Emori
- Tianxiang Nan
- Xinjun Wang
- Yuan Gao
- Zhongqiang Hu
Organizations
- Air Force Research Laboratory
- National Natural Science Foundation of China
- Northeastern University
- Shanghai Institute of Ceramics
- W. M. Keck Foundation
- Xi'an Jiaotong University