THERMODYNAMIC AND MAGNETIC-PROPERTIES OF THE S=1 HEISENBERG CHAIN NI(C2H8N2)(2)NI(CN)(4) - EXPERIMENTS AND THEORY

Authors
ORENDAC M ORENDACOVA A CERNAK J FEHER A SIGNORE PJC MEISEL MW MERAH S VERDAGUER M
Citation
M. Orendac et al., THERMODYNAMIC AND MAGNETIC-PROPERTIES OF THE S=1 HEISENBERG CHAIN NI(C2H8N2)(2)NI(CN)(4) - EXPERIMENTS AND THEORY, Physical review. B, Condensed matter, 52(5), 1995, pp. 3435-3440
Citations number
27
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
52
Issue
5
Year of publication
1995
Pages
3435 - 3440
Database
ISI
SICI code
0163-1829(1995)52:5<3435:TAMOTS>2.0.ZU;2-V
Abstract
Specific-heat and susceptibility studies of powdered Ni(C2H8N2)(2)Ni(C N)(4) have been performed from 50 mK to 20 K, and magnetization measur ements have been conducted at 4.3 K in magnetic fields up to 6 T. The results show that Ni(C2H8N2)(2)Ni(CN)(4) is an S = 1 antiferromagnetic Heisenberg chain with a strong planar anisotropy. The low-temperature specific-heat data show a contribution due to magnetic excitations wh ich are interpreted within the framework of a strong coupling theory o f (anti)excitons.