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Susceptibility and high-field magnetization curves for CuBr2(N2C4H6)2: An alternating antiferromagneticS = 1 2Heisenberg chain

Authors
Journal
Physica B+C
0378-4363
Publisher
Elsevier
Publication Date
Volume
97
Identifiers
DOI: 10.1016/0378-4363(79)90054-8
Disciplines
  • Physics

Abstract

Abstract Magnetic susceptibility data (for 1.2 < T < 300 K) and high-field magnetization curves (up to B = 35 T, at temperatures T = 1.2 and 4.2 K) are presented for the linear-chain compound CuBr 2(N 2C 4H 6) 2. Both types of measurements are in excellent agreement with a model assuming an alternating antiferromagnetic exchange for the copper S = 1 2 moments along the chain. The fit to theory gives J/ k = -10.4 ± 0.4 K and an alternation ratio of 0.4 ± 0.1.

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