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Proceedings Paper

Ultrafast magneto-optical spectroscopy of BiFeO3-BaTiO3 based structures
Author(s): Brenden A. Magill; Michael Bishop; Stephen A. McGill; Yuon Zhou; Anuj Chopra; Deepam Maurya; Hyun-Cheol Song; Shashank Priya; Giti A. Khodaparast
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Paper Abstract

Ultrafast optical spectroscopy can provide insight into fundamental microscopic interactions, dynamics and the coupling of several degrees of freedom. Pump/ probe studies can reveal the answer to questions like “What are the achievable switching speeds in multiferroics?”, “What is the influence of the crystallographic orientation and domain states on the available switching states?”, and “What is the effect of the hetrostructure on promoting the coupling between the varying field excitations?”. In this presentation, we report on two color (400/800nm) ultrafast pump-probe differential reflectance spectroscopy of BiFeO3-BaTiO3 structures to probe the coupling between optical and acoustic phonons to spin waves. The data presented here is a combination of different transient reflectivity measurements to probe both the carrier and spin dynamics. The (001)-BiFeO3-BaTiO3 thin films were prepared using pulsed laser deposition on vicinal SrTiO3 substrates using La0.70 Sr0.30MnO3 bottom electrodes. Crystal orientation and topography were analyzed by x-ray diffraction and atomic force microscopy. . Our results are important to developing devices on the basis of this material system. This work was supported by the AFOSR through grant FA9550-14-1-0376,NSF-Career Award DMR-0846834, and the Virginia Tech Institute for Critical Technology and Applied Science.

Paper Details

Date Published: 8 September 2015
PDF: 5 pages
Proc. SPIE 9551, Spintronics VIII, 95510T (8 September 2015); doi: 10.1117/12.2185964
Show Author Affiliations
Brenden A. Magill, Virginia Polytechnic Institute and State Univ. (United States)
Michael Bishop, National High Magnetic Field Lab. (United States)
Stephen A. McGill, National High Magnetic Field Lab. (United States)
Yuon Zhou, Virginia Polytechnic Institute and State Univ. (United States)
Anuj Chopra, Virginia Polytechnic Institute and State Univ. (United States)
Deepam Maurya, Virginia Polytechnic Institute and State Univ. (United States)
Hyun-Cheol Song, Virginia Polytechnic Institute and State Univ. (United States)
Shashank Priya, Virginia Polytechnic Institute and State Univ. (United States)
Giti A. Khodaparast, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 9551:
Spintronics VIII
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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