Raman Whitepaper: Raman-spectroscopic study of magnetic interactions in multiferroic ionic crystals

Structural, dielectric and Raman-spectroscopic study of complex electric and magnetic interactions in multiferroic ionic crystals


by Holger Gibhardt*, Fabian Ziegler, Götz Eckold

Georg-August-University of Göttingen, Tammannstr. 6, D-37077 Göttingen, Germany.


Read the full paper here: https://432c1d11-8ebb-49bd-8e2f-2cc63a44e589.usrfiles.com/ugd/432c1d_3d80627f8a294e6ebacb2070c69e66da.pdf


* Corresponding author: hgibhar@gwdg.de

Multiferroic materials are of great interest, since they provide the simultaneous presence

of (anti-)ferromagnetic, (anti-)ferroelectric and (anti-)ferroelastic ordered regions within

a crystal. Unfortunately, most systems that have been investigated so far exhibit these

extraordinary properties only at low temperatures. In view of possible applications in

information technology, sensor technology etc., it is therefore a crucial task to increase

the temperature range of multiferroics. Since the exact mechanism of spin coupling with

the movement of ions and the resulting electric dipole moment is still not fully

understood, detailed experimental and theoretical studies are needed which require

advanced techniques like high-resolution Raman-spectroscopy with suitable laser

sources.


Hence, we used a novel solid-state red laser Solo 640 (UNIKLASERS), which meets these requirements very well. This laser has a wavelength of 640 nm and a maximum power of 500 mW (at the sample, 10 mW are applied)...[More]



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[2] L. Meddar et al., Chem. Mater. 24, 353 (2012).

[3] L. Y. Chang, Mineral. Mag. 36, 992 (1968).

[4] V. Hardy et al., J. Phys. Condens. Matter 28, 336003 (2016).