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- W2852023150 abstract "Spins in molecular magnets can experience both anisotropic exchange interactions and on-site magnetic anisotropy. In this paper, we study the effect of exchange anisotropy on the molecular magnetic anisotropy both with and without on-site anisotropy. When both the anisotropies are small, we find that the axial anisotropy parameter ${D}_{M}$ in the effective spin Hamiltonian is the sum of the individual contributions due to exchange and on-site anisotropies. We find that even for axial anisotropy of about $15%$, the low-energy spectrum does not correspond to a single-parent spin manifold but has intruder states arising from other parent spins. In this case, the low-energy spectrum cannot be described by multiplet states arising from a single approximate total spin state. We study the magnetic susceptibility, specific heat as a function of temperature, and magnetization as a function of applied field to characterize the system in this limit. We find that there is synergy between the two anisotropies, particularly for large systems with higher site spins." @default.
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- W2852023150 date "2018-12-07" @default.
- W2852023150 modified "2023-10-16" @default.
- W2852023150 title "Modeling molecular magnets with large exchange and on-site anisotropies" @default.
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- W2852023150 doi "https://doi.org/10.1103/physrevb.98.214409" @default.
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