Multiferroicity in the spin-1/2 quantum matter of LiCu2O 2

A. Rusydi, I. Mahns, S. Müller, M. Rübhausen, S. Park, Y. J. Choi, C. L. Zhang, S. W. Cheong, S. Smadici, P. Abbamonte, M. V. Zimmermann, G. A. Sawatzky

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44 Citations (Scopus)

Abstract

Multiferroicity in Li Cu2 O2 single crystals is studied using resonant soft x-ray magnetic scattering, hard x-ray diffraction, heat capacity, magnetic susceptibility, and electrical polarization. Two magnetic transitions are found at 24.6 K (T1) and 23.2 K (T2). Our data are consistent with a sinusoidal spin structure at T2 <T< T1 and with a helicoidal spin structure at T< T2, giving rise to ferroelectricity. Surprisingly, above T2, the correlation lengths of the spin structures increase as the temperature increases with dramatic changes of ∼42% occurring along the c axis.

Original languageEnglish
Article number262506
JournalApplied Physics Letters
Volume92
Issue number26
DOIs
Publication statusPublished - 2008

Bibliographical note

Funding Information:
We acknowledge M. Mostovoy for helpful discussions and financial support by the Helmholtz Association VH-FZ-007, DFG Ru 773/2-3, DE-FG02-06ER46285, NSLS No. DE-AC02-98CH10886, the Canadian funding agencies: NSERC, CIAR, and CFI, NSF-MDR-0405682.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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