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Updated: May 17, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Tuning the interactions from antiferro- to ferro-magnetic by molecular tailoring and manipulating
Xiaoying Zhang1, Bo Li, Jinkui Tang
1Faculty of Chemistry, Northeast Normal University, Changchun 130024, China.
Abstract:
Four novel Cu(II) complexes {Na[Cu(4)(hmp)(4)(CHOO)(3)](ClO(4))(2)·H(2)O}(n) (1), [Cu(8)(hmp)(8)(CH(3)COO)(6)](ClO(4))(2) (2), [Cu(4)(hmp)(4)(CH(3)CN)(2)(ClO(4))(2)(H(2)O)(2)](ClO(4))(2) (3), and [Cu(4)(hmp)(4)(CH(3)COO)(2)(H(2)O)(4)](ClO(4))(2)·2H(2)O (4) with Hhmp = 2-(hydroxymethyl)pyridine were prepared by structural modulation at room temperature. Taking advantage of the steric hindrance of the ancillary ligands, the 1D copper chain (1) is successfully cut down into the octa-nuclear copper cluster (2) with the unchanged antiferromagnetic [Cu(4)O(4)] open-cubane that is further separated into weak antiferromagnetic [Cu(4)O(4)] (3) and then modulated to be the ferromagnetic tetra-nuclear [Cu(4)O(4)] cluster (4). The obtained four complexes allow us to systematically investigate their magnetic properties and find the rules for further magnetic investigations. The results showed that there exist antiferromagnetic interactions between Cu(ii) ions in 1-3, while 4 displays ferromagnetic behaviour. The best fitting results to the experimental magnetic susceptibilities gave J(1) = J(2) = J(3) = -2.26 cm(-1), g = 2.11 for 3 and J(1) = 37.05 cm(-1), J(2) = -0.62 cm(-1), J(3) = -0.62 cm(-1), g = 2.13 for 4.
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