Magnetic Behavior in Two-Dimensional Molecule-Based Magnets
Understanding the magnetic behavior in two-dimensional molecule-based magnets with S=2 spins, exploring MnF3(pyz) with Jahn-Teller elongated Mn(III) octahedra, and discussing the crossover between classical and quantum regimes. The research involves DFT calculations for 1D antiferromagnetic systems, analysis of magnetic order oscillations below transition temperature, and observations of hysteresis in AC susceptibility above 9.1 K. The conclusions highlight the complexity of low-dimensional antiferromagnetic systems with S=2 spin centers, a broad transition at 9.1 K, and the persistence of short-range correlation indicated by the hysteresis in AC susceptibility.
- Magnetic Behavior
- Molecule-Based Magnets
- Two-Dimensional
- Low-Dimensional Magnetism
- Antiferromagnetic
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Magnetic behaviour in two- dimensional molecule-based magnets with S=2 spins N. P. Bentley, T. Lancaster, A. Hernandez-Melian, B. M. Huddart, S. Vaidya, P. A. Goddard & J. L. Manson
MnF3(pyz) 2D Rectangular lattice Jahn-Teller elongated Mn(lll) octahedra S = 2 spin centres Layers pack out of registry Crossover between classical and quantum regime
1D Fisher D.C. susceptibility 2D Lines Low Dimensional Magnetism 1D or 2D? Fitting doesn t distinguish between 1D and 2D
DFT Calculations 1D AFM for small U values
?SR Data ? ? = ?1? ?1????+ ?2? ?2? 1 61 + cos??? +1 ? ? = ?1? ?1?cos?? + ?2? ?2?+ ?3? ?3? cos??? +cos3??? ???= 3 2 2 Oscillations due to magnetic order below transition temperature Oscillations due to formation of F ? state above transition temperature
?SR Analysis below ?? Transition to LRO occurs at 9.1 K Transition is broad, seen in amplitudes of different asymmetry components
A.C. Susceptibility above ?? Hysteresis observed above 9.1 K
Conclusions Low dimensional AFM Complexity due to S = 2 spin centres Broad transition, occurs at 9.1 K A.C. susceptibility displays hysteresis above transitions, implies persistence of short-range correlation
