Field dependence of magnetic ordering in Kagome-staircase compound Ni3V2O8

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dc.contributor.author Kenzelmann, M.
dc.contributor.author Harris, A.B.
dc.contributor.author Aharony, A.
dc.contributor.author Entin-Wohlman, O.
dc.contributor.author Yildirim, T.
dc.contributor.author Huang, Q.
dc.contributor.author Park, S.
dc.contributor.author Lawes, G.
dc.contributor.author Broholm, C.
dc.contributor.author Rogado, N.
dc.contributor.author Cava, R.J.
dc.contributor.author Kim, K.H.
dc.contributor.author Jorge, G.
dc.contributor.author Ramirez, A.P.
dc.date.accessioned 2010-01-06T15:53:57Z
dc.date.available 2010-01-06T15:53:57Z
dc.date.issued 2006-07-01
dc.identifier.citation Source: Physical Review B (Condensed Matter and Materials Physics) 1 July 2006, vol.74, no.1, pp. 14429-1-26 en
dc.identifier.uri http://jhir.library.jhu.edu/handle/1774.2/33750
dc.description.abstract We present powder and single-crystal neutron diffraction and bulk measurements of the Kagome-staircase compound Ni3V2O8 (NVO) in fields up to 8.5 T applied along the c direction. (The Kagome 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 TCC'=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. en
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dc.description.provenance Made available in DSpace on 2010-01-06T15:53:57Z (GMT). No. of bitstreams: 1 Broholm Field dependence 2006.pdf: 1210284 bytes, checksum: e53789fbe57dc988ad9c6f37175a6033 (MD5) Previous issue date: 2006-07-01 en
dc.language.iso en_US en
dc.publisher American Physical Society en
dc.subject simplified model Hamiltonian en
dc.subject temperature-field phase diagram en
dc.subject Bragg peaks en
dc.subject cross-tie moments en
dc.subject longitudinal incommensurate structure en
dc.subject appropriate irreducible representation en
dc.subject Kagome-staircase compound en
dc.subject magnetic ordering en
dc.subject weak ferromagnetism en
dc.subject pseudodipolar interactions en
dc.subject specific heat en
dc.subject space groups en
dc.subject nickel compounds en
dc.subject neutron diffraction en
dc.subject magnetic transitions en
dc.subject magnetic moments en
dc.subject exchange interactions (electron) en
dc.subject commensurate-incommensurate transformations en
dc.subject antiferromagnetic materials en
dc.subject Dzyaloshinskii-Moriya interaction en
dc.subject Ni3V2O8 en
dc.title Field dependence of magnetic ordering in Kagome-staircase compound Ni3V2O8 en
dc.type Article en

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