期刊
APPLIED PHYSICS LETTERS
卷 110, 期 20, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4983810
关键词
-
资金
- Spins and Heat in Nanoscale Electronic Systems (SHINES), an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences (BES) [SC0012670]
- Conselho Nacional de Desenvolvimento a Pesquisa (CNPq)
- program Ciencias sem Fronteiras
We report the results of an investigation of the temperature dependence of the magnon and phonon frequencies in NiO. A combination of Brillouin-Mandelstam and Raman spectroscopies allowed us to elucidate the evolution of the phonon and magnon spectral signatures from the Brillouin zone center (GHz range) to the second-order peaks from the zone boundary (THz range). The temperature-dependent behavior of the magnon and phonon bands in the NiO spectrum indicates the presence of antiferromagnetic (AF) order fluctuation or a persistent AF state at temperatures substantially above the Neel temperature (T-N=523 K). Tuning the intensity of the excitation laser provides a method for disentangling the features of magnons from acoustic phonons in AF materials without the application of a magnetic field. Our results are useful for the interpretation of the inelastic-light scattering spectrum of NiO and add to the knowledge of its magnon properties important for THz spintronic devices. Published by AIP Publishing.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据