Modulating the magnetic relaxation of lanthanide-based single-molecule magnets  

作　　者：ZHANG Peng ZHANG Li XUE ShuFang LIN ShuangYan TANG JinKui 

机构地区：[1]State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]College of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021,China

出　　处：《Chinese Science Bulletin》2012年第20期2517-2524,共8页

基　　金：supported by the National Natural Science Foundation of China(91022009 and 20921002)

摘　　要：In the area of molecular magnetism,single molecule magnets (SMMs) containing lanthanide elements are of immense scientific and technological interest because of their large energy barriers and high measured hysteresis temperature.Although there has been significant progress in the synthesis and characterization of lanthanide-based SMMs,there are still challenges,for instance,how single-ion anisotropy of lanthanide elements can be exploited,and how zero-field tunneling of magnetization can be suppressed.This article is devoted to the progress in various methodologies for modulating magnetic relaxation,especially in terms of crystal field and magnetic interactions.The crystal field plays a dominant role in creating single-molecule magnets with largely anisotropic f-elements,while the strong coupling between magnetic centers is able to suppress quantum tunneling of magnetization efficiently.In the area of molecular magnetism,single molecule magnets （SMMs） containing lanthanide elements are of immense scientific and technological interest because of their large energy barriers and high measured hysteresis temperature.Although there has been significant progress in the synthesis and characterization of lanthanide-based SMMs,there are still challenges,for instance,how single-ion anisotropy of lanthanide elements can be exploited,and how zero-field tunneling of magnetization can be suppressed.This article is devoted to the progress in various methodologies for modulating magnetic relaxation,especially in terms of crystal field and magnetic interactions.The crystal field plays a dominant role in creating single-molecule magnets with largely anisotropic f-elements,while the strong coupling between magnetic centers is able to suppress quantum tunneling of magnetization efficiently.

关 键 词：单分子磁体 磁弛豫 单离子各向异性 镧系元素 稀土 调制 量子隧道 分子磁学 

分 类 号：P618.7[天文地球—矿床学]