Ultrafast spin polarization in a multiferroic manganite BiFe0.5Mn0.5O3 thin film

Authors

Zeyu Zhang, Shanghai University
Zuanming Jin, Shanghai University
Xian Lin, Shanghai University
Zhenxiang Cheng, University of WollongongFollow
H Y. Zhao, Wuhan Institute of Technology
Hideo Kimura, National Institute For Materials ScienceFollow
Guohong Ma, Shanghai UniversityFollow

RIS ID

104166

Publication Details

Zhang, Z. Y., Jin, Z. M., Lin, X., Cheng, Z. X., Zhao, H. Y., Kimura, H. & Ma, G. H. (2015). Ultrafast spin polarization in a multiferroic manganite BiFe0.5Mn0.5O3 thin film. Europhysics Letters: a letters journal exploring the frontiers of physics, 112 (3), 37007-1-37007-5.

Abstract

In this work, we present observations of ultrafast carrier dynamics and spin polarization in a multiferroic manganite BiFe0.5Mn0.5O3 film excited by linearly and circularly polarized femtosecond pulses, respectively. The d-band charge transfer transition is reasonably assigned to Γ3 → Γ5. The transient reflectivity decay on a time scale as fast as only 0.3 ps is consistent with the picture of ultrafast electron-phonon coupling. The ultrafast switching of polarization ellipticity (< 150 fs) originates from a transient coherent spin polarization by optical orientation. The ultrafast spin polarization switching is assigned to the Raman coherence process.

Grant Number

NHMRC/960804

Additional Grant Number

http://purl.org/au-research/grants/NHMRC/960804