Zhangzhen He

Novel ordering of an S = 1/2 quasi-1d Ising-like antiferromagnet in magnetic field.

High-field specific heat measurements on BaCo(2)V(2)O(8), which is a good realization of an S=1/2 quasi-one-dimensional (1D) Ising-like antifferomagnet, have been performed in magnetic fields up to 12 T along the chain and at temperature down to 200 mK. We have found a new magnetic ordered state in the field-induced phase above H(c) approximately 3.9 T. We suggest that a novel type of the incommensurate order, which is caused by the quantum effect inherent in the S=1/2 quasi-1D Ising-like antiferromagnet, appears in the field-induced phase.

Large magnetic anisotropy in the quasi-one-dimensional system BaCo2V2O8

Magnetic anisotropy in the one-dimensional spin chain system BaCo2V2O8 is investigated using magnetic susceptibility, magnetization, and heat capacity measurements. Unusual magnetic anisotropy is observed in the paramagnetic state at room temperature. The magnetic anisotropy energy of BaCo2V2O8 is estimated to be greater than 1.44(4)×107erg∕cm3 at 2K using a simple uniaxial two-sublattice mean-field model.

Longitudinal spin density wave order in a quasi-1D Ising-like quantum antiferromagnet.

From neutron diffraction measurements on a quasi-1D Ising-like Co2+ spin compound BaCo2V2O8, we observed an appearance of a novel type of incommensurate ordering in magnetic fields. This ordering is essentially different from the Néel-type ordering, which is expected for the classical system, and the peculiar spin structure is caused by quantum fluctuation inherent in the quantum spin chain. A Tomonaga-Luttinger liquid nature characteristic of the gapless quantum 1D system is responsible for the realization of the incommensurate ordering.

Magnetic structure and spin dynamics of the quasi-one-dimensional spin-chain antiferromagnet BaCo 2 V 2 O 8

We report a neutron diffraction and muon spin relaxation

High field magnetism of the quasi one-dimensional anisotropic antiferromagnet BaCo2V2O8

\ensuremath{\mu}

Low-energy excitations probed by 51V NMR in the multiferroic Ni3V208

SR study of static and dynamical magnetic properties of

Low temperature magnetism of the S = 1/2 quasi one-dimensional Ising-like anitiferromagnet BaCo2V2O8

{\mathrm{BaCo}}_{2}{\mathrm{V}}_{2}{\mathrm{O}}_{8}

磁場中でのS=1/2 擬一次元Ising様反強磁性体に関する新しい規則化

, a quasi-one-dimensional spin-chain system. A proposed model for the antiferromagnetic structure includes: a propagation vector

Field-induced order-disorder transition in antiferromagnetic BaCo(2)V(2)O(8) driven by a softening of spinon excitation.

{\mathrm{kP\vec}}_{\text{AF}}=(0,0,1)

Flux growth and magnetic properties of FeVO4 single crystals

, independent of external magnetic fields for fields below a critical value