Kyushu University · 재료과학
Shu-Qi Wu 교수의 연구실은 분자 기반의 자기계수성 및 자기전기성 물질, 특히 스핀 코어전ition, 단일분자 자성체, 전자적 전이를 유도하는 분자 구조의 설계에 중점을 두고 있습니다. 고체 상태에서의 스핀 릴랙세이션 메커니즘, 특히 레온드론-포톤 상호작용과 같은 나노스케일 현상이 분자 자성체의 거시적 거동에 미치는 영향을 탐구하며, 분자 구조의 정밀 제어를 통해 새로운 물리적 성질을 유도합니다. 특히, 4d/3d 금속 중심 복합체와 란타니드 복합체를 활용한 분자 자기소재의 설계 및 응용에 뛰어난 기여를 하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Polarization change induced by directional electron transfer attracts considerable attention owing to its fast switching rate and potential light control. Here, we investigate electronic pyroelectricity in the crystal of a mononuclear complex, [Co(phendiox)(rac-cth)](ClO<sub>4</sub>)·0.5EtOH (1·0.5EtOH, H<sub>2</sub>phendiox = 9, 10-dihydroxyphenanthrene, rac-cth = racemic 5, 5, 7, 12, 12, 14-hexamethyl-1, 4, 8, 11-tetraazacyclotetradecane), which undergoes a two-step valence tautomerism (VT). C
A supramolecular strategy has been applied to construct two tetranuclear lanthanide complexes for investigating the magnetic properties of individual lanthanide ions. The Ln(III) complexes (Ln = Dy, Tb) display field-induced slow magnetization relaxation, typical of single-molecule magnet behavior. The four lanthanide ions in the molecules are well separated by distances of ca. 9 Å, and thus the slow magnetization relaxation should be assigned to single-ion magnet (SIM) behavior. Therefore, the
The development of magnetic molecules with long spin reversal/decoherence times highly depends on the understanding of relaxation behavior under different external conditions. Herein, a magnetic study on a Ru<sup>III</sup> complex (1) is presented. Detailed analysis of the relaxation time and the magneto-heat capacity data suggests that the resonant phonon trapping process dominates the magnetic relaxation in the crystalline sample of 1, slowing down the spin relaxation rate, as further confirme
Supramolecular strategy was employed to achieve the highest nuclearity Co(II) cluster exhibiting spin-crossover (SCO) behavior. Magnetic susceptibility characterization of the Co4(II) complex shows that two different spin-transition processes occur. The SCO behavior is directed by the partially deprotonated polydentate ligand, which favors the structural distortion required by the spin transition.
Molecular-based magnetoelectric materials are among the most promising materials for next-generation magnetoelectric memory devices. However, practical application of existing molecular systems has proven difficult largely because the polarization change is far lower than the practical threshold of the ME memory devices. Herein, we successfully obtained an [FeCo] dinuclear complex that exhibits a magnetic field-induced spin crossover process, resulting in a significant polarization change of 0.4
We present a tunable spin Hall effect of light (SHEL) by introducing a monolayer of graphene on the hexagonal boron nitride (hBN). The interaction between the phonon polaritons in hBN and the plasmon polaritons in graphene can significantly enhance the SHEL around epsilon-near-zero (ENZ) near reststrahlen band-I (RB-I) in a very wide range of incident angles and compress it obviously in reststrahlen band-II (RB-II). The spin shifts can be obtained by adjusting the ratio of reflective coefficient
