Detection of Coherent Magnons via Ultrafast Pump-Probe Reflectance Spectroscopy in Multiferroic Ba_0.6Sr_1.4Zn₂Fe₁₂O₂₂

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D. Talbayev,¹ S. A. Trugman,¹ A. V. Balatsky,¹ T. Kimura,² A. J. Taylor,¹ and R. D. Averitt^1,3
¹Center for Integrated Nanotechnologies, MS K771, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
²Division of Materials Physics, Graduate School of Engineering Science, Osaka University Toyonaka, Osaka 560-8531, Japan
³Department of Physics, Boston University, 590 Commonwealth Ave, Boston, Massachusetts 02215, USA

Received 29 September 2007; published 28 August 2008

Wereport the detection of a magnetic resonance mode in multiferroicBa_0.6Sr_1.4Zn₂Fe₁₂O₂₂ using time-domain pump-probe reflectance spectroscopy. Magnetic sublattice precession iscoherently excited via picosecond thermal modification of the exchange energy.Importantly, this precession is recorded as a change in reflectancecaused by the dynamic magnetoelectric effect. Thus, transient reflectance providesa sensitive probe of magnetization dynamics in materials with strongmagnetoelectric coupling, such as multiferroics, revealing new possibilities for applicationin spintronics and ultrafast manipulation of magnetic moments.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.101.097603
DOI:	10.1103/PhysRevLett.101.097603
PACS:	76.50.+g; 75.80.+q; 78.20.Ls; 78.47.-p 76.50.+g Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance 75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction 78.20.Ls Magnetooptical effects (bulk materials/thin films) 78.47.-p Spectroscopy of solid state dynamics YEAR: 2008

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Phys. Rev. Lett. 101, 097603 (2008) [4 pages]

Detection of Coherent Magnons via Ultrafast Pump-Probe Reflectance Spectroscopy in Multiferroic Ba0.6Sr1.4Zn2Fe12O22

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Detection of Coherent Magnons via Ultrafast Pump-Probe Reflectance Spectroscopy in Multiferroic Ba_0.6Sr_1.4Zn₂Fe₁₂O₂₂