Slow magnetic relaxation in a Dy₃ triangle and a bistriangular Dy₆ cluster

Area of Science:

• Inorganic Chemistry
• Materials Science
• Magnetism

Background:

• Lanthanide complexes are investigated for their potential as single-molecule magnets (SMMs).
• The development of SMMs with high performance is crucial for future data storage and quantum computing applications.

Purpose of the Study:

• To synthesize and characterize novel lanthanide-based single-molecule magnets.
• To investigate the structural and magnetic properties of two distinct dysprosium complexes.
• To understand the relationship between molecular structure and magnetic relaxation behavior.

Main Methods:

• Synthesis and structural characterization of two dysprosium complexes.
• Magnetic property measurements, including dynamic magnetic susceptibility.
• Computational analysis using *ab initio* calculations to elucidate magnetic properties.

Main Results:

• Two lanthanide complexes, Dy3 (1) and Dy6 (2), were successfully synthesized and structurally elucidated.
• Complex 1 exhibited two-step magnetic relaxation with effective energy barriers of 40.1 K (SR) and 31.0 K (FR).
• Complex 2 displayed slow magnetic relaxation behavior only above 2 K, indicating distinct magnetic dynamics compared to Complex 1.

Conclusions:

• The structural differences between the Dy3 triangular core in complex 1 and the hexanuclear Dy6 core in complex 2 lead to varied magnetic relaxation behaviors.
• *Ab initio* calculations provide insights into the origins of these differing magnetic properties.
• These findings contribute to the design principles for developing advanced lanthanide-based single-molecule magnets.