SMM Behaviour of the Butterfly {CrIII2DyIII2} Pivalate Complex and Magneto-structurally Correlated Relaxation Thermal Barrier

Mecchia Ortiz JH, Cabrosi D, Carrella LM, Rentschler E, Albores P (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Chemistry - A European Journal Wiley

Book Volume: 28

Article Number: e202201450

Journal Issue: 59

DOI: 10.1002/chem.202201450

Abstract

We are reporting the synthesis, single-crystal X-ray structure characterization, and magnetic property investigations of the pivalate butterfly {Cr^III2Ln^III2} complexes with Ln= Gd and Dy and the isostructural Y(III) sample. We found an anti-ferromagnetic Cr(III)-Ln(III) exchange interaction, which, as previously observed in related Cr(III)/Ln(III) systems, plays a key role in suppressing quantum tunnelling of magnetization and enhances the SMM performance in the Dy(III) complex. In fact, a pure Orbach relaxation mechanism, with absence of QT regime, is observed with a thermal barrier of 50 cm⁻¹, leading to magnetization hysteresis opening, measured with a commercial magnetometer, up to 3.6 K with a coercive field of 2.9 T. Analysis of SMM behaviour in literature-known butterfly {Cr^III2Dy^III2} complexes, reveals the existence of a magneto-structural correlation between Ueff, the thermal barrier size, and the mean Cr−Dy bond distances. Moreover, a clear correlation is found for the thermal barrier magnitude and the maximum temperature hysteresis opening and coercive field.

Involved external institutions

Universidad de Buenos Aires (UBA) / University of Buenos Aires

Argentina (AR) Johannes Gutenberg-Universität Mainz (JGU)

Germany (DE)

How to cite

APA:

Mecchia Ortiz, J.H., Cabrosi, D., Carrella, L.M., Rentschler, E., & Albores, P. (2022). SMM Behaviour of the Butterfly {CrIII2DyIII2} Pivalate Complex and Magneto-structurally Correlated Relaxation Thermal Barrier. Chemistry - A European Journal, 28(59). https://doi.org/10.1002/chem.202201450

MLA:

Mecchia Ortiz, Juan H., et al. "SMM Behaviour of the Butterfly {CrIII2DyIII2} Pivalate Complex and Magneto-structurally Correlated Relaxation Thermal Barrier." Chemistry - A European Journal 28.59 (2022).

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