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Updated: Apr 1, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Spatial distribution of phases during gradual magnetostructural transitions in copper(II)-nitroxide based molecular
Matvey V Fedin1, Sergey L Veber1, Elena G Bagryanskaya2
1International Tomography Center SB RAS, 630090, Novosibirsk, Russia. mfedin@tomo.nsc.ru and Novosibirsk State University, 630090, Novosibirsk, Russia.
Abstract:
Copper(ii)-nitroxide based molecular magnets Cu(hfac)2L(R) exhibit thermally-induced transitions between high- and low-temperature (HT/LT) magnetostructural states. In this work we report the first study on the spatial distribution of HT/LT phases during gradual transitions in these compounds. We explore the possibility of domain formation at intermediate temperatures, which has never been addressed before. For this purpose, we reexamine the available electron paramagnetic resonance (EPR) and X-ray diffraction data, and perform numerical calculations of EPR spectra for different models of exchange-coupled networks. A thorough analysis shows that during gradual transitions, molecular magnets Cu(hfac)2L(R) represent solid solutions of disordered HT and LT phases, and the formation of single-phase domains larger than a few nanometers in size is unlikely.
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