Field-induced long-range ordering in an S = 1 quasi-one-dimensional Heisenberg antiferromagnet

Z. Honda, K. Katsumata, Yoshihiro Nishiyama, I. Harada

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Abstract

Detailed results of heat capacity and magnetization measurements are reported on a single crystal sample of the spin S=1 quasi-one-dimensional Heisenberg antiferromagnet Ni(C5H14N2)2N3 (PF6), abbreviated NDMAP. From these results, we constructed the magnetic field (H) versus temperature phase diagram of this compound which exhibits the quantum disordered Haldane, field-induced long-range-ordered (LRO) and thermally disordered paramagnetic phases. The phase boundary curve separating the paramagnetic and LRO phases is anisotropic; the increase of the Néel temperature (TN) with H along the a and b axes is more rapid than that along the c axis. We calculated TN as a function of H by taking into account the interchain coupling as the form of a mean field. The calculation of the staggered susceptibility of the S = 1 one-dimensional antiferromagnet with an easy-plane anisotropy shows quite different behavior in the different field directions, resulting in the anisotropic phase boundary curve. A good agreement is obtained between theory and experiment using the exchange and anisotropy constants obtained from the neutron scattering experiment.

Original languageEnglish
Article number064420
Pages (from-to)644201-644209
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number6
Publication statusPublished - 2001

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Phase boundaries
Anisotropy
anisotropy
curves
Neutron scattering
Specific heat
Phase diagrams
Magnetization
neutron scattering
Experiments
phase diagrams
specific heat
Single crystals
Magnetic fields
magnetic permeability
Temperature
magnetization
temperature
single crystals
magnetic fields

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Field-induced long-range ordering in an S = 1 quasi-one-dimensional Heisenberg antiferromagnet. / Honda, Z.; Katsumata, K.; Nishiyama, Yoshihiro; Harada, I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 63, No. 6, 064420, 2001, p. 644201-644209.

Research output: Contribution to journalArticle

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