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首页> 外文期刊>Physical review >Detection of ground states in frustrated molecular rings by in-field local magnetization profiles
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Detection of ground states in frustrated molecular rings by in-field local magnetization profiles

机译:通过场内局部磁化曲线检测受阻分子环中的基态

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摘要

It is demonstrated by means of exact numerical methods that the ground state of nine-membered frustrated homometallic chromium-based molecular rings with a single bond defect can be unambiguously determined by the in-field local magnetization profiles, which exhibit characteristic patterns.The strength of the coupling corresponding to the defect can be determined by both total and local magnetization measurements on single crystals with the field perpendicular to the ring.This approach is illustrated with a recently synthesized chromium ring Cr_9Cl_2, which is experimentally characterized by low-temperature magnetic measurements and analyzed by means of the microscopic quantum model.The strength of the coupling corresponding to the defect is estimated by fitting the magnetic susceptibility of a powder sample and independently confirmed from the experimental intersection point of total magnetization profiles preserving the typical values of the remaining parameters, which are well established for known chromium rings.
机译:通过精确的数值方法证明,具有单键缺陷的九元受挫的基于均金属铬的分子环的基态可以通过场内局部磁化曲线明确地确定,该场表现出特征模式。缺陷的耦合可以通过垂直于环垂直场的单晶的总磁化强度和局部磁化强度测量来确定。这种方法用最近合成的铬环Cr_9Cl_2进行了说明,该环通过低温磁测量和实验来表征。通过拟合粉末样品的磁化率来估算与缺陷相对应的耦合强度,并从总磁化曲线的实验交点独立确定,以保留其余参数的典型值;哪个好为已知的铬环而设计。

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  • 来源
    《Physical review》 |2013年第18期|184430.1-184430.6|共6页
  • 作者单位

    Faculty of Physics, Adam Mickiewicz University, ul.Umultowska 85, 60-614 Poznan, Poland;

    Faculty of Physics, Adam Mickiewicz University, ul.Umultowska 85, 60-614 Poznan, Poland;

    Faculty of Physics, Adam Mickiewicz University, ul.Umultowska 85, 60-614 Poznan, Poland;

    School of Chemistry and Photon Science Institute, The University of Manchester, Manchester M13 9PL, United Kingdom;

    School of Chemistry and Photon Science Institute, The University of Manchester, Manchester M13 9PL, United Kingdom;

    School of Chemistry and Photon Science Institute, The University of Manchester, Manchester M13 9PL, United Kingdom;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    molecular magnets; macroscopic quantum phenomena in magnetic systems;

    机译:分子磁体磁性系统中的宏观量子现象;

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