Printing Air-Stable High-T_c Molecular Magnet with Tunable Magnetic Interaction

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• High-temperature (high-T_c) molecular magnets offer significant potential but face challenges in practical application due to limited control over magnetization dynamics and nonvolatile properties.
• Existing molecular magnets often suffer from poor functional durability, degrading when exposed to oxygen and heat, hindering their long-term use.

Purpose of the Study:

• To introduce a rapid prototyping and stabilizing strategy for high-T_c molecular magnets with enhanced durability and precise geometric control.
• To investigate the mechanisms behind magnetic exchange interactions and their tunability in these novel molecular magnets.

Main Methods:

• Additive manufacturing (3D printing) was employed for rapid prototyping and precise spatial control of molecular magnet geometry.
• X-ray magnetic circular dichroism and computational modeling were utilized to analyze the role of water ligands in magnetic exchange interactions.
• Thermal stability and air stability tests were conducted to assess the functional durability of the printed molecular magnets.

Main Results:

• The study successfully produced molecular magnets with a high critical temperature (T_c) of 360 K.
• The printed molecular magnets demonstrated remarkable thermal stability up to 400 K and air stability for over 300 days.
• Water ligands were identified as key factors controlling magnetic exchange interactions, which are dynamically and reversibly tunable.
• A wide working temperature window of 86 K (258–344 K) was achieved due to the tunable magnetic exchange interactions.

Conclusions:

• A novel strategy combining additive manufacturing and chemical stabilization enables the creation of robust, high-T_c molecular magnets.
• The findings highlight the crucial role of ligand engineering in achieving dynamic control over magnetic properties and enhancing material durability.
• This work presents a viable pathway for developing flexible, lightweight, and durable molecular magnetic devices for various applications.