Phys. Rev. B 75, 212402 (2007) [4 pages]Absence of commensurate ordering at the polarization flop transition in multiferroic DyMnO3Received 21 February 2007; revised 4 April 2007; published 5 June 2007 Ferroelectric spiral magnets DyMnO3 and TbMnO3 show similar behavior of electric polarization in applied magnetic fields. Studies of the field dependence of lattice modulations on the contrary show a completely different picture. Whereas in TbMnO3 the polarization flop from P∥c to P∥a is accompanied by a sudden change from incommensurate to commensurate wave vector modulation, in DyMnO3 the wave vector varies continuously through the flop transition. This smooth behavior may be related to the giant magnetocapacitive effect observed in DyMnO3. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.212402
DOI:
10.1103/PhysRevB.75.212402
PACS:
75.47.Lx, 77.80.Bh, 77.22.Ej, 78.70.Ck
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