Properties of Fe4Cu2 magnetic cluster compound

Shukla, S and Hossain, SM and Mehta, S and Kamilya, S and Mondal, A and Sarma, DD (2021) Properties of Fe4Cu2 magnetic cluster compound. In: Bulletin of Materials Science, 44 (3).

PDF bul_mat_sci_44-03_2021.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

We have designed and synthesized a novel magnetic cluster containing low-spin (S = 1/2) Fe3+ and spin-1/2 Cu2+ ions, which incorporates competing ferromagnetic Fe�Cu interactions and antiferromagnetic Fe�Fe and Cu�Cu interactions. This is achieved with the help of a cyanido-bridged hexanuclear iron-copper cluster {Fe(Tp)(CN)3}4{Cu(MePz)2}2 following the building block approach. All experiments were carried out using the stable compound, {Fe(Tp)(CN)3}4{Cu(MePz)2}2, after removing the solvent molecules at 110°C for 2 h. Unusual magnetic interactions in this compound are revealed by the temperature- and field-dependent dc magnetic measurements. These magnetic measurements indicate the existence of ferromagnetic interactions between the low-spin Fe3+ and Cu2+ ions via cyanide bridge dominating magnetic properties over a wide temperature range below ~15 K. At a still lower temperature, magnetic properties appear to be controlled by an effective antiferromagnetic interaction, possibly arising from inter-cluster couplings. Frequency-dependent ac susceptibility measurements establish a possible glassy state emerging below 4 K. © 2021, Indian Academy of Sciences.

Item Type:	Journal Article
Publication:	Bulletin of Materials Science
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer
Keywords:	Antiferromagnetism; Ferromagnetic materials; Magnetic susceptibility; Magnetic variables measurement, Ac-susceptibility measurements; Antiferro-magnetic interactions; Dc magnetic measurements; Ferro-magnetic interactions; Frequency dependent; Lower temperatures; Magnetic interactions; Wide temperature ranges, Ferromagnetism
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	21 Sep 2021 09:32
Last Modified:	21 Sep 2021 09:32
URI:	http://eprints.iisc.ac.in/id/eprint/69769

Actions (login required)

View Item