Low Temperature Physics: 41, 15 (2015); https://doi.org/10.1063/1.4906311
Fizika Nizkikh Temperatur: Volume 41, Number 1 (January 2015), p. 22-27    ( to contents , go back )

Coexistence of spin-crossover and magnetic ordering in the dendrimeric Fe(III) complex

V.E. Vorobeva, N.E. Domracheva

Kazan Physical-Technical Institute of Russian Academy of Sciences, 10/7 Sibirskiy trakt, Kazan 420029, Russia
E-mail: vvalerika@gmail.com; ndomracheva@gmail.com

A.V. Pyataev

Kazan Federal University, 18 Kremlyovska Str., Kazan 420008, Russia

M.S. Gruzdev, and U.V. Chervonova

Институт химии растворов им. Г.А. Крестова РАН, ул. Академическая, 1, г. Иваново, 153045, Россия
E-mail: gms@isc-ras.ru; uch@isc-ras.ru
pos Анотація:

Received August 18, 2014

Abstract

The magnetic properties of the dendrimeric spin-crossover Fe(III) complex of formula [Fe(L)2]+PF6-, where L = 3,5-di[3,4,5-tris(tetradecyloxy) benzoyloxy]benzoyl-4-salicylidene-N’-ethyl-N-ethylenediamine are reported for the first time. EPR spectroscopy shows that the compound displays a gradual spin-crossover in the temperature range (70–300 K) and undergoes an antiferromagnetic ordering below 10 K. Mössbauer spectroscopy data confirm the existence of magnetic ordering at 5 K in the Fe(III) dendrimeric complex.

76.30.–v Electron paramagnetic resonance and relaxation;
PACS: 75.10.Dg Crystal-field theory and spin Hamiltonian;
PACS: 75.30.Et Exchange and superexchange interactions;
PACS: 76.80.+y Mössbauer effect.

Key words: EPR, Mössbauer spectroscopy, Fe(III) complexes, spin-crossover, magnetism, dendrimers.

Published online:: November 24, 2014

Download 685604 byte View Contents