|
|||||
|
|
Single-molecule magnet behavior enhanced by magnetic coupling between 4f and 3d spins |
|
| Authors: | Atsushi Okazawa Hiroyuki Nojiri Takayuki Ishida Norimichi Kojima |
| Institution: | a Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Japan b Institute for Materials Research, Tohoku University, Japan c CINTS, Tohoku University, Japan d Department of Engineering Science, The University of Electro-Communications, Japan |
| Abstract: | We synthesized and characterized a new compound {Dy(hfac)3}2Pd(dpk)2] (Dy2Pd]; Hdpk = di-2-pyridyl ketoxime), which is isostructural with the known Dy2Cu] and Dy2Ni]. The study of the Dy2Pd] compound containing diamagnetic Pd ion is indispensable to clarify a contribution of the exchange coupling for a 4f-3d single-molecule magnet behavior. From the ac susceptibility measurements on Dy2Pd], we obtained Δ/kB = 28.6(11) K and TB = 1.1 K. In accordance with the blocking behavior, the pulsed-field magnetization showed the hysteresis behavior below 1.1 K. These parameters on Dy2Pd] having SPd = 0 was compared with those of the derivatives having SCu = 1/2 (Δ/kB = 47 K and TB = 1.8 K) and SNi = 1 (Δ/kB = 62(4) K and TB = 2.5 K). The TB and Δ steadily increase with the increasing 3d(4d) spin quantum number. |
| Keywords: | Single-molecule magnet Lanthanoid Rare earth metal Exchange interaction |
| 本文献已被 ScienceDirect 等数据库收录！ | |