Field dependence of magnetic ordering in Kagomé-staircase compound Ni3 V2 O8

M. Kenzelmann, A. B. Harris, A. Aharony, O. Entin-Wohlman, T. Yildirim, Q. Huang, S. Park, G. Lawes, C. Broholm, N. Rogado, R. J. Cava, K. H. Kim, G. Jorge, A. P. Ramirez

Research output: Contribution to journalArticle

99 Scopus citations

Abstract

We present powder and single-crystal neutron diffraction and bulk measurements of the Kagomé-staircase compound Ni3 V2 O8 (NVO) in fields up to 8.5 T applied along the c direction. (The Kagomé plane is the a-c plane.) This system contains two types of Ni ions, which we call "spine" and "cross-tie." Our neutron measurements can be described with the paramagnetic space group Cmca for T<15 K and each observed magnetically ordered phase is characterized by the appropriate irreducible representation(s). Our zero-field measurements show that at TPH =9.1 K NVO undergoes a transition to a predominantly longitudinal incommensurate structure in which the spine spins are nearly along the a -axis. At THL =6.3 K, there is a transition to an elliptically polarized incommensurate structure with both spine and cross-tie moments in the a-b plane. At TLC =4 K the system undergoes a first-order phase transition to a commensurate antiferromagnetic structure with the staggered magnetization primarily along the a -axis and a weak ferromagnetic moment along the c -axis. A specific heat anomaly at T CC′ =2.3 K indicates an additional transition, which remarkably does not affect Bragg peaks of the commensurate C structure. Neutron, specific heat, and magnetization measurements produce a comprehensive temperature-field phase diagram. The symmetries of the incommensurate magnetic phases are consistent with the observation that only one phase is electrically polarized. The magnetic structures are explained theoretically using a simplified model Hamiltonian, that involves competing nearest- and next-nearest-neighbor exchange interactions, single-ion anisotropy, pseudodipolar interactions, and Dzyaloshinskii-Moriya interactions.

Original languageEnglish (US)
Article number014429
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number1
DOIs
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Field dependence of magnetic ordering in Kagomé-staircase compound Ni3 V2 O8'. Together they form a unique fingerprint.

  • Cite this

    Kenzelmann, M., Harris, A. B., Aharony, A., Entin-Wohlman, O., Yildirim, T., Huang, Q., Park, S., Lawes, G., Broholm, C., Rogado, N., Cava, R. J., Kim, K. H., Jorge, G., & Ramirez, A. P. (2006). Field dependence of magnetic ordering in Kagomé-staircase compound Ni3 V2 O8. Physical Review B - Condensed Matter and Materials Physics, 74(1), [014429]. https://doi.org/10.1103/PhysRevB.74.014429