| Author(s): |
Shin G Chou; David F. Plusquellic; Paul E. Stutzman; Shuangzhen Wang; Edward J. Garboczi; |
| Title: |
High Resolution THz Optical Absorption Study of Antiferromagnetic Magnons in Hematite (alpha-Fe2O3) |
| Published: |
July 09, 2012 |
| Abstract: |
We report the high resolution optical measurement for the temperature dependence of the antiferromagnetic resonance (AFMR) transition in alpha-Fe2O3 between (0.5 and 10)cm-1. We found that below the Morin transition temperature when the spins are perfectly antiparallel, the AFMR transition could be clearly observed. The absorption peak position over a large temperature range are found to be in good agreement with theoretical analysis. The high spectral resolution optical measurements as demonstrated in this study allows unprecedented zero-field analysis of the AFMR excitation in a previously challenging spectral region, suggesting the frequency-resolved measurement platform could be extended for non-destructive examination applications for antiferromagnetic materials and devices. |
| Citation: |
Applied Physics Letters |
| Keywords: |
non-destructive examination; THz metrology |
| Research Areas: |
Optical Technology, Terahertz Metrology |
