Half-ordered state in the anisotropic Haldane-gap antiferromagnet NDMAP
arXiv:cond-mat/0411293 · doi:10.1103/PhysRevB.71.104418
Abstract
Neutron diffraction experiments performed on the Haldane gap material NDMAP in high magnetic fields applied at an angle to the principal anisotropy axes reveal two consecutive field-induced phase transitions. The low-field phase is the gapped Haldane state, while at high fields the system exhibits 3-dimensional long-range Neel order. In a peculiar phase found at intermediate fields only half of all the spin chains participate in the long-range ordering, while the other half remains disordered and gapped.
4 pages, 2 figures, submitted to Phys. Rev. B
References in corpus (11)
- Understanding Far-Infrared Absorption in the S=1 Antiferromagnetic Chain Compound NENP
- Haldane-gap excitations in the low-H_c 1-dimensional quantum antiferromagnet NDMAP
- Field-induced 3- and 2-dimensional freezing in a quantum spin liquid
- Evidence for the singlet-dimer ground state in an S = 1 antiferromag netic bond alternating chain
- Massive triplet excitations in a magnetized anisotropic Haldane spin chain
- Dynamical Properties of a Haldane Gap Antiferromagnet
- Quasi-elastic neutron scattering in the high-field phase of a Haldane antiferromagnet
- Ordering and Excitations in the Field-Induced Magnetic Phase of Cs_3Cr_2Br_9
- Dynamics of an anisotropic Haldane antiferromagnet in strong magnetic field
- Zeeman levels with exotic field dependence in the high field phase of a S=1 Heisenberg antiferromagnetic chain
- Field-induced commensurate long-range order in the Haldane-gap system NDMAZ