Publication Type:

Journal Article

Source:

Solid State Communications, Elsevier Ltd, Volume 207, p.16-20 (2015)

URL:

http://www.scopus.com/inward/record.url?eid=2-s2.0-84923268144&partnerID=40&md5=63ad922e3be7da54d6ea3ab2459491bd

Keywords:

Curie-Weiss temperature, Exchange and super-exchange, Ferromagnetic orderings, Ligands, Magnetic frustrations, Magnetically ordered material, Magnetization measurements, Polycrystalline samples, Structural and magnetic properties, X ray diffraction

Abstract:

Single crystalline and polycrystalline samples of S=1/2 Kagomé lattices {[Cu3(CO3)2(bpe)3](CLO4)2}n and {[Cu3(CO3)2(bpy)3](CLO4)2}n, respectively were synthesized. Their structural and magnetic properties were characterized by means of x-ray diffraction and magnetization measurements. Both compounds crystalize in a hexagonal structure (space group P-6) consisting of CuO4 Kagomé layers in the ab-plane but linked along c direction through either rigid bpy or flexible bpe ligands to form 3D frame works. Magnetic measurements reveal that both the compounds undergo ferromagnetic ordering (TC) at low temperatures and the TC and the extent of frustration could be tuned by changing the nature of the pillar ligands. {[Cu3(CO3)2(bpe)3](CLO4)2}n which is made up of flexible bpe ligands has a TC of 5.7 K and a Curie-Weiss temperature (θCW) of -39.7 K giving rise to a frustration parameter of |θCW|/TC≈6.96. But the replacement of bpe by a more rigid and electronically delocalized bpy ligand leads to an enhanced TC≈9.3K and a reduced frustration parameter of |θCW|/TC≈3.54. © 2015 Published by Elsevier Ltd.

Notes:

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Cite this Research Publication

M. O. Ajeesh, Yogi, A., M. Padmanabhan, and Nath, R., “Tuning of magnetic frustration in S = 1 / 2 Kagomé lattices {[Cu3(CO3)2(bpe)3](CLO4)2}n and {[Cu3(CO3)2(bpy)3](CLO4)2}n through rigid and flexible ligands”, Solid State Communications, vol. 207, pp. 16-20, 2015.