Zero-Field Splitting in Cyclic Molecular Magnet {Cr8Y8}: A High-Frequency ESR Study
نویسندگان
چکیده
Cyclic 3d-4f molecular magnets have received considerable attention owing to their potential applications in high-density data storage and quantum information processing. As a rare example of ferromagnetic polynuclear Cr rings, {Cr8Y8} represents valuable test bed directly study the magnetic interaction between Cr3+ ions large hexadecametallic {Cr8Ln8} (Ln = 4f metal) molecules. We proposed “single-J” model approximate low-temperature spin dynamics our earlier study, while zero-field splitting (ZFS) levels was also suggested by heat capacity data. In order deeper understanding magnetism {Cr8Y8}, it is necessary verify ZFS means high-resolution spectral methods identify its origin. this work, we present high-frequency electron resonance (HF-ESR) on {Cr8Y8}. The X-band ESR spectra consists multi-peak structure, indicative anisotropy that breaks degeneracy states absence field. HF-ESR are collected extract parameters. observed sharp peak due transitions S 11 broadband corresponding distribution peaks 12 levels. By analyzing spectra, confirm expected ground state determine parameter D as −0.069 K, and, furthermore, reproduce recorded at 154 GHz. macrospin proves still be valid. attributed axial anisotropy, found some other Cr-based wheels. detailed investigation presented paper will benefit studies wheels with Ln3+ highlights importance method probe determining parameters very small magnitude.
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ژورنال
عنوان ژورنال: Magnetochemistry
سال: 2023
ISSN: ['2312-7481']
DOI: https://doi.org/10.3390/magnetochemistry9020049