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Electric-Field Modulation of Spin Resonance in a Perovskite-Like Multiferroic Fe-Metal-Organic Framework
Muhammad Waqas Nafees1,2, Ubaid Raza1,2, Lunhua He1,2
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Inorganic Chemistry
|May 15, 2026
Summary
Electric fields can tune magnetic properties in metal-organic frameworks. This study shows electric-field cooling protocols influence electron spin resonance in Fe-MOF crystals, demonstrating electric-field control of magnetic order.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Chemistry
Background:
- Multiferroic metal-organic frameworks (MOFs) are promising for electric-field control of magnetism.
- Understanding spin dynamics in MOFs is crucial for developing novel electronic devices.
Purpose of the Study:
- To investigate the electric-field modulation of magnetic order in single-crystal [(CH3)2NH2]Fe(HCOO)3 (Fe-MOF).
- To explore the spin-resonance response under various cooling protocols and electric field variations.
Main Methods:
- X-band electron spin resonance (ESR) spectroscopy was employed.
- Measurements were conducted on Fe-MOF single crystals under different cooling conditions (ZFC, HFC, EFC, EHFC).
- Electric fields (E) were applied and varied to observe their effect on resonance parameters.
Main Results:
- Protocol-dependent variations in resonance field (Hr) and intensity (I) were observed below the magnetic ordering temperature (TN ≈ 18.5 K).
- Electric-field cooling (EFC) induced small but reproducible shifts in Hr and systematic variations in I(E).
- Combined electric- and magnetic-field cooling (EHFC) resulted in larger, symmetric modulation of Hr and reversible changes in I(E).
Conclusions:
- The study demonstrates electric-field sensitivity of the spin-resonance response in Fe-MOF.
- The observed effects are confined to the magnetically ordered phase, supporting dipole-coupled spin interactions.
- These findings highlight the potential for electric-field control of magnetic order in MOFs.
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