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Structure and magnetic properties of (5BAP)2CuBr4: Magneto-structural correlations of layered S = 1/2 Heisenberg antiferromagnets

Journal Article


Abstract


  • The synthesis, structure and magnetic behavior of (5BAP)2CuBr4 are reported (5BAP = 2-amino-5-bromopyridinium). (5BAP)2CuBr4 is a member of a family of CuX42- (X = Cl, Br) compounds which form C-centered lattices with two-dimensional (2D) antiferromagnetic interactions. Crystallographic data: monoclinic, C2/c, a = 13.28 Å, b = 8.719 Å, c = 16.11 Å, β = 95.40°, Z = 4. The structure was solved by direct methods and refined to R = 0.0346 (Rw = 0.0827) for 1749 observed unique reflections and 105 parameters. The CuBr42- ions exist as distorted tetrahedra and are related by centering parallel to the C-face giving rise to a square magnetic lattice. Magnetic susceptibility measurements over the temperature range of 2.1-100 K correspond to an intra-planar magnetic exchange constant of -6.94(6) K and indicate a transition to 3D order at 4.0(2) K. The effects of structural variations upon the magnetic properties of the CuX42- layered compounds are considered. © 2001 Elsevier Science B.V. All rights reserved.

Publication Date


  • 2001

Citation


  • Woodward, F. M., Landee, C. P., Giantsidis, J., Turnbull, M. M., & Richardson, C. (2001). Structure and magnetic properties of (5BAP)2CuBr4: Magneto-structural correlations of layered S = 1/2 Heisenberg antiferromagnets. Inorganica Chimica Acta, 324(1-2), 324-330. doi:10.1016/S0020-1693(01)00671-5

Scopus Eid


  • 2-s2.0-0035851569

Start Page


  • 324

End Page


  • 330

Volume


  • 324

Issue


  • 1-2

Abstract


  • The synthesis, structure and magnetic behavior of (5BAP)2CuBr4 are reported (5BAP = 2-amino-5-bromopyridinium). (5BAP)2CuBr4 is a member of a family of CuX42- (X = Cl, Br) compounds which form C-centered lattices with two-dimensional (2D) antiferromagnetic interactions. Crystallographic data: monoclinic, C2/c, a = 13.28 Å, b = 8.719 Å, c = 16.11 Å, β = 95.40°, Z = 4. The structure was solved by direct methods and refined to R = 0.0346 (Rw = 0.0827) for 1749 observed unique reflections and 105 parameters. The CuBr42- ions exist as distorted tetrahedra and are related by centering parallel to the C-face giving rise to a square magnetic lattice. Magnetic susceptibility measurements over the temperature range of 2.1-100 K correspond to an intra-planar magnetic exchange constant of -6.94(6) K and indicate a transition to 3D order at 4.0(2) K. The effects of structural variations upon the magnetic properties of the CuX42- layered compounds are considered. © 2001 Elsevier Science B.V. All rights reserved.

Publication Date


  • 2001

Citation


  • Woodward, F. M., Landee, C. P., Giantsidis, J., Turnbull, M. M., & Richardson, C. (2001). Structure and magnetic properties of (5BAP)2CuBr4: Magneto-structural correlations of layered S = 1/2 Heisenberg antiferromagnets. Inorganica Chimica Acta, 324(1-2), 324-330. doi:10.1016/S0020-1693(01)00671-5

Scopus Eid


  • 2-s2.0-0035851569

Start Page


  • 324

End Page


  • 330

Volume


  • 324

Issue


  • 1-2