期刊
PHYSICAL REVIEW B
卷 105, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.104422
关键词
-
资金
- U.K. Engineering and Physical Sciences Research Council [EP/M020517/1, EP/T027991/1, EP/R042594/1]
- Science and Technology Facilities Council
In this study, we investigated the magnetic excitation spectrum of Fe3+ and Yb3+ ions in ytterbium iron garnet through experimental and theoretical methods. Our findings provide valuable insights for the quantitative analysis of the 4f-3d exchange interaction.
In this work, we explore experimentally and theoretically the spectrum of magnetic excitations of the Fe3+ and Yb3+ ions in ytterbium iron garnet (Yb3Fe5O12). We present a complete description of the crystal-field splitting of the 4f states of Yb3+, including the effect of the exchange field generated by the magnetically ordered Fe subsystem. We also consider a further effect of the Fe-Yb exchange interaction, which is to hybridize the Yb crystal field excitations with the Fe spin-wave modes at positions in the Brillouin zone where the two types of excitations cross. We present detailed measurements of these hybridized excitations, and we propose a framework that can be used in the quantitative analysis of the coupled spectra in terms of the anisotropic 4f-3d exchange interaction.
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