The Use of Magnetic Dilution To Elucidate the Slow Magnetic Relaxation Effects of a Dy2 Single-Molecule Magnet
The Use of Magnetic Dilution To Elucidate the Slow Magnetic Relaxation Effects of a Dy2 Single-Molecule Magnet
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DOI：
10.1021/ja2017009
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发表时间：
2011-06-15
影响因子：
15
通讯作者：
Murugesu, Muralee
中科院分区：
文献类型：
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作者：
Habib, Fatemah;Lin, Po-Heng;Murugesu, Muralee
采用磁稀释法来阐明 Dy-2 单分子磁体 (SMM) 中磁化缓慢弛豫的根源。使用 SQUID 和微型 SQUID 测量在抗磁性 Y-2 基质中稀释的 Dy-2 SMM 上研究掺杂效应。通过施加最佳直流场可以抑制可能发生的磁化的量子隧道效应。研究发现，占主导地位的单离子弛豫与分子内邻近的 Dy-III 离子弛豫纠缠在一起，极大地影响了该复合物中磁化强度的量子隧道效应。
The magnetic dilution method was employed in order to elucidate the origin of the slow relaxation of the magnetization in a Dy-2 single-molecule magnet (SMM). The doping effect was studied using SQUID and micro-SQUID measurements on a Dy-2 SMM diluted in a diamagnetic Y-2 matrix. The quantum tunneling of the magnetization that can occur was suppressed by applying optimum dc fields. The dominant single-ion relaxation was found to be entangled with the neighboring Dy-III ion relaxation within the molecule, greatly influencing the quantum tunneling of the magnetization in this complex.