Magnetic Properties of the Diamond Chain Compound Cu3(CO3)2(OH)2
Magnetic Properties of the Diamond Chain Compound Cu3(CO3)2(OH)2
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DOI：
10.1143/ptps.159.1
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发表时间：
2005-05
影响因子：
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通讯作者：
H. Kikuchi;Y. Fujii;M. Chiba;S. Mitsudo;T. Idehara;T. Tonegawa;K. Okamoto;T. Sakai;T. Kuwai;K. Kindo;A. Matsuo;W. Higemoto;K. Nishiyama;M. Horvatić;Claude Bertheir
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文献类型：
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作者：
H. Kikuchi;Y. Fujii;M. Chiba;S. Mitsudo;T. Idehara;T. Tonegawa;K. Okamoto;T. Sakai;T. Kuwai;K. Kindo;A. Matsuo;W. Higemoto;K. Nishiyama;M. Horvatić;Claude Bertheir
蓝铜矿（Cu 3（CO 3）2（OH）2）是反铁磁量子自旋链中受抑的金刚石自旋链的模型物质。用单晶测量了蓝铜矿的强场磁化强度（60 T）、磁化率、磁熵、μ子自旋弛豫和1H-NMR。一个明显的1/3磁化平台被证实是存在于磁化曲线。~ 1H-NMR的两个共振峰。观察了通过分析它们的超精细位移的温度依赖性。我们发现了两种不同的局部磁化率，分别对应于二聚体和单体自旋的磁化率。新的场诱导相变被发现发生在临界磁场的磁平台的起始。磁性比热和磁化率随温度的变化揭示了短程磁有序的形成过程是一个特殊的两阶段过程。
Azurite (Cu 3 (CO 3 ) 2 (OH) 2 ) is a model substance of a diamond spin chain, one of frustrated antiferromagnetic quantum spin chains. The high field magnetization up to 60 T, magnetic susceptibility, magnetic entropy, muon spin relaxation and 1 H-NMR of azurite have been measured using single crystals. A distinct 1/3 magnetization plateau is confirmed to be present in the magnetization curve. Two resonance peaks of 1 H-NMR. were observed. By analyzing temperature dependencies of their hyperfine shift. we found two different local susceptibilities which correspond to susceptibility of dimer and monomer spins, respectively. New field induced phase transition was found to occur at a critical field where the magnetic plateau onsets. A short range magnetic ordering developed in a peculiar two-stage process, which was revealed by temperature dependence of the magnetic specific heat and susceptibility.