Effect of high pressure on the crystal structure, magnetic, and vibrational properties of multiferroic RbFe(MoO4)(2)

D. P. Kozlenko*, S. E. Kichanov, E. V. Lukin, N. T. Dang, L. S. Dubrovinsky, E. A. Bykova, K. V. Kamenev, H. -P. Liermann, W. Morgenroth, A. Ya. Shapiro, B. N. Savenko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The structural, magnetic, and vibrational properties of RbFe(MoO4) 2 have been studied by means of x-ray and neutron powder diffraction, magnetic susceptibility measurements, and Raman spectroscopy at pressures up to 10 GPa. The gradual structural phase transition from the initial trigonal P (3) over bar m1 phase to the monoclinic C2/c phase via the intermediate P (3) over bar phase was observed at P similar to 1 GPa. The triangular antiferromagnetic order with a propagation vector q = (1/3, 1/3, q(z)) in the suppressed trigonal phase remains incommensurate, and the q(z) value increases from 0.45 to 0.48 in the pressure range 0- 2 GPa at T = 2 K. The pressure coefficient of the Neel temperature is equal to (1/T-N)dT(N)/dP = 0.09 GPa(-1). No evidence of the formation of the long-range magnetic order in the monoclinic phase was found. The pressure dependencies of the vibrational modes for the trigonal and monoclinic phases were obtained.

Original languageEnglish
Article number014112
Number of pages6
JournalPhysical review B
Volume87
Issue number1
DOIs
Publication statusPublished - 22 Jan 2013

Keywords / Materials (for Non-textual outputs)

  • DIFFRACTION
  • SCATTERING
  • DIAMOND

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