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A high-field phase transition in the linear chain compound CuSO4· 5H2O

Authors
Journal
Physica
0031-8914
Publisher
Elsevier
Publication Date
Volume
69
Issue
1
Identifiers
DOI: 10.1016/0031-8914(73)90227-9
Disciplines
  • Physics

Abstract

Abstract Cupric sulphate pentahydrate contains two nearly independent magnetic systems, originating in the two unequivalent Cu 2+ ions in the unit cell. One of these systems can be described as one-dimensional chain of spins S = 1 2 with an antiferromagnetic Heisenberg interaction J/ k = -3.0 K. The weak coupling between the chains gives rise to a phase transition at about 0.1 K in the field interval between 3 kOe and 38 kOe. This phase transition has been detected by nuclear magnetic resonance and by specific-heat experiments. The results of these measurements are discussed and a tentative theory is developed to explain the nature of the transition.

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