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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/044/0229

    • Keywords

       

      Hexanuclear cluster; iron-copper; cyanide building block; ferromagnetic interaction; antiferromagnetic interaction; spin glass.

    • Abstract

       

      We have designed and synthesized a novel magnetic cluster containing low-spin (S = 1/2) Fe$^{3+}$ and spin-1/2 Cu$^{2+}$ 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 Fe$^{3+}$ and Cu$^{2+}$ ions via cyanide bridge dominating magnetic properties over a wide temperature range below ${\sim}$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.

    • Author Affiliations

       

      SWAPNIL SHUKLA SAYED MUKTAR HOSSAIN SAKSHI MEHTA SUJIT KAMILYA ABHISHAKE MONDAL D D SARMA1

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India

    • Dates

       
      Published
      13 August 2021
      Manuscript received
      1 March 2021
      Accepted
      15 June 2021
      Final version published online
      13 August 2021

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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