Terahertz emission spectroscopy of laser-induced spin dynamics in TmFeO3 and ErFeO3 orthoferrites

Mikhaylovskiy, R. V. and Hendry, E. and Kruglyak, V. V. and Pisarev, R. V. and Rasing, Th. and Kimel, A. V. (2014) Terahertz emission spectroscopy of laser-induced spin dynamics in TmFeO3 and ErFeO3 orthoferrites. Physical review B, 90 (18). ISSN 1098-0121

Full text not available from this repository.

Abstract

Using the examples of laser-induced spin-reorientation phase transitions in TmFeO 3 and ErFeO 3 orthoferrites, we demonstrate that terahertz emission spectroscopy can obtain novel information about ultrafast laser-induced spin dynamics, which is not accessible by more common all-optical methods. The power of the method is evidenced by the fact that, in addition to the expected quasi-ferromagnetic and quasi-antiferromagnetic modes of the iron sublattices, terahertz emission spectroscopy enables detection of a resonance optically excited at an unexpected frequency of ∼0.3–0.35 THz. By recording how the amplitude and phase of the excited oscillations depend on temperature and applied magnetic field, we show that the unexpected mode has all the features of a spin resonance of the Fe 3 + ions. We suggest that it can be assigned to transitions between the multiplet sublevels of the 6 A 1 ground state of the Fe + 3 ions occupying rare-earth positions.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
ID Code:
138572
Deposited By:
Deposited On:
04 Nov 2019 16:40
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Sep 2020 06:24