AI Article Synopsis
- The compound [(L)Dy(CyPO)]·[BPh] (1-Dy) was synthesized and showed a unique pentagonal bipyramidal structure around the Dy(III) ion when analyzed crystallographically.
- AC magnetic susceptibility measurements indicated that 1-Dy behaves as a single-molecule magnet, evidenced by specific frequency-dependent signals in the absence of a static magnetic field.
- Further analysis revealed that under-barrier magnetic relaxations like Raman and quantum tunneling of magnetization (QTM) significantly influence the energy barrier for magnetization flip (50 K), despite the strong axial character of the Dy(III) ion.
Article Abstract
We report the synthesis of [(L)Dy(CyPO)]·[BPh] (1-Dy) (where HL = 2,6-diacetylpyridine bis-benzoylhydrazone and Cy = cyclohexyl) which crystallized in the triclinic, 1̄ space group. The local geometry around Dy(III) in 1-Dy was found to be pentagonal bipyramidal (pseudo-). The AC magnetic susceptibility measurements performed on 1-Dy and on its diluted 1-Y(Dy) samples showed a typical single-molecule magnet signature revealed by the appearance of AC-frequency dependent out-of-phase susceptibility signals in the absence of a static magnetic field. The out-of-phase AC susceptibility signals were well resolved on the application of a small magnetic field ( = 500 Oe) and yielded an energy barrier for magnetization flipping of / = 50 K for the diluted derivative. The magnetic studies on 1-Dy and 1-Y(Dy) and data analysis further confirm that Raman and QTM under-barrier magnetic relaxations play a crucial role in lowering despite the almost axial nature of the Dy(III) ion in 1-Dy. We have rationalized these observations through detailed calculations performed on the X-ray crystal structure of 1-Dy.
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