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  Field-induced linear magnetoelastic coupling in multiferroic TbMnO3

Aliouane, N., Argyriou, D. N., Strempfer, J., Zegkinoglou, I., Landsgesell, S., & Zimmermann, M. V. (2006). Field-induced linear magnetoelastic coupling in multiferroic TbMnO3. Physical Review B, 73(2): 020102(R).

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 Creators:
Aliouane, N., Author
Argyriou, D. N., Author
Strempfer, J.1, Author           
Zegkinoglou, I.1, Author           
Landsgesell, S., Author
Zimmermann, M. V., Author
Affiliations:
1Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370480              

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 Abstract: We have used in-field neutron and x-ray single-crystal diffraction to
measure the incommensurability delta of the crystal and magnetic
structures of multiferroic TbMnO3. We show that the flop in the
electric polarization at the critical field H-C, for field H along the
a and b axes, coincides with a first-order transition to a commensurate
phase with propagation vector kappa= (0, 1/4,0). In- field x-ray
diffraction measurements show that the quadratic magnetoelastic
coupling breaks down with applied field as shown by the observation of
the first harmonic lattice reflections above and below H-C. This
indicates that magnetic field induces a linear magnetoelastic coupling.

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Language(s): eng - English
 Dates: 2006
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 273444
ISI: 000235009300002
 Degree: -

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Title: Physical Review B
Source Genre: Journal
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Pages: - Volume / Issue: 73 (2) Sequence Number: 020102(R) Start / End Page: - Identifier: ISSN: 1098-0121